A man standing on a edge of a cliff throws a stone vertically upwards with a certain speed. He then throws another stone downwards with the same speed. Find the ratio of the speeds of the two stones when they hit the ground. (1) 1 : 1 (2) 1 : 2 (3) 1 : 4 (4) Cannot be found from the given information.

A man standing on a edge of a cliff throws a stone vertically upwards with a certain speed. He then throws another stone downwards with the same speed. Find the ratio of the speeds of the two stones when they hit the ground. (1) 1 : 1 (2) 1 : 2 (3) 1 : 4 (4) Cannot be found from the given information.
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 1 : 1
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A man standing on a edge of a cliff throws a stone vertically upwards with a certain speed. He then throws another stone downwards with the same speed. Find the ratio of the speeds of the two stones when they hit the ground. (1) 1 : 1 (2) 1 : 2 (3) 1 : 4 (4) Cannot be found from the given information.

Description : A man standing on a edge of a cliff throws a stone vertically upwards with a certain speed. He then throws another stone downwards with the same speed. Find the ratio of the speeds of the two stones when they hit the ground ... : 1 (2) 1 : 2 (3) 1 : 4 (4) Cannot be found from the given information.

Last Answer : (1) 1 : 1 Explanation: The stone which is throws upward will have the same velocity of u at the point of its original position when it is falling down. Another stone is thrown downwards with u. So ... will hit the ground with same velocity. So the ratio between the speeds of two stones will be 1:1

A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct? (1) Both the spheres will reach the ground simultaneously. (2) A will reach the ground first. (3) B will reach the ground first. (4) The question is incomplete because the masses of the spheres are not given.

Description : A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct? (1) Both the ... reach the ground first. (4) The question is incomplete because the masses of the spheres are not given.

Last Answer : (1) Both the spheres will reach the ground simultaneously. Explanation: If no air resistance is present, the rate of descent depends only on how far the object has fallen, no matter how heavy ... objects will reach the ground at the same time if they are dropped simultaneously from the same height.

A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct ? (1) Both the spheres will reach the ground simultaneously. (2) A will reach the ground first. (3) B will reach the ground first. (4) The question is incomplete because the masses of the spheres are not given.

Description : A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct ? (1) Both the ... reach the ground first. (4) The question is incomplete because the masses of the spheres are not given.

Last Answer : Both the spheres will reach the ground simultaneously.

A man is standing ner the edge of a uniformly rotating platform about an axis passing through its centre. The speed of rotation of the platorm will decrease if he a.extends his arms outwards b.107 dynes c.moves towards the axis of rotation d.jumps out from that platform e.take out his coat and throws away

Description : A man is standing ner the edge of a uniformly rotating platform about an axis passing through its centre. The speed of rotation of the platorm will decrease if he a.extends his arms outwards b.107 ... towards the axis of rotation d.jumps out from that platform e.take out his coat and throws away

Last Answer : a. extends his arms outwards

A block P released from the top of a smooth inclined plane slides down the plane. Another block Q is dropped from the same point and falls vertically downwards. Which one of the following statements will be true if the friction offered by air is negligible? (a) Both blocks will reach the ground at the same time (b) Block P will reach the ground earlier than block Q (c) Both blocks will reach the ground with the same speed (d) Block Q will reach the ground with a higher speed than block P

Description : A block P released from the top of a smooth inclined plane slides down the plane. Another block Q is dropped from the same point and falls vertically downwards. Which one of the following statements will be ... with the same speed (d) Block Q will reach the ground with a higher speed than block P

Last Answer : Ans:(c)

A ball is thrown vertically upwards from the ground with a speed of 80 feet/second. In the English system of units, what is the magnitude and direction of the acceleration of the ball?

Description : A ball is thrown vertically upwards from the ground with a speed of 80 feet/second. In the English system of units, what is the magnitude and direction of the acceleration of the ball? 

Last Answer : ANSWER: 32 FEET PER SECOND SQUARED DOWN or TOWARDS THE EARTH  

A boy is standing on an elevator which is traveling downward with a constant velocity of 30 meters per second. The boy throws a ball vertically upward with a velocity of 10 meters per second relative to the elevator. What is the velocity of the ball, MAGNITUDE AND DIRECTION, relative to the elevator shaft the instant the boy releases the ball?

Description : A boy is standing on an elevator which is traveling downward with a constant velocity of 30 meters per second. The boy throws a ball vertically upward with a velocity of 10 meters per second ... the ball, MAGNITUDE AND DIRECTION, relative to the elevator shaft the instant the boy releases the ball?

Last Answer : ANSWER: 20 METERS PER SECOND DOWN

A stone of wight 100 kg is thrown vertically upwards by a man of height y = 1.8 m with an initial velocity of 20 m/sec. The maximum height to which it will rise would be a.22.2 m b.26 m c.15.1 m d.20.2 m e.10 m

Description : A stone of wight 100 kg is thrown vertically upwards by a man of height y = 1.8 m with an initial velocity of 20 m/sec. The maximum height to which it will rise would be a.22.2 m b.26 m c.15.1 m d.20.2 m e.10 m

Last Answer : a. 22.2 m

A stone is thrown vertically upwards from the ground with a velocity 15 m/s. At the same instant a ball is dropped from a point directly

Description : A stone is thrown vertically upwards from the ground with a velocity 15 m/s. At the same instant a ball is dropped from a point directly

Last Answer : A stone is thrown vertically upwards from the ground with a velocity 15 m/s. At the same instant a ball ... Use g = 10 m/s2 for ease of calculation).

On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be (A) Downwards at its upper end (B) Upwards at its upper end (C) Perpendicular to the wall at its upper end (D) Zero at its upper end

Description : On the ladder resting on the ground and leaning against a smooth vertical wall, the force of  friction will be  (A) Downwards at its upper end  (B) Upwards at its upper end  (C) Perpendicular to the wall at its upper end  (D) Zero at its upper end 

Last Answer : (D) Zero at its upper end 

On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be (A) Towards the wall at its upper end (B) Away from the wall at its upper end (C) Upwards at its upper end (D) Downwards at its upper end

Description : On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be (A) Towards the wall at its upper end (B) Away from the wall at its upper end (C) Upwards at its upper end (D) Downwards at its upper end

Last Answer : (C) Upwards at its upper end

If a student drops a stone from a cliff of height 30 m and the time it takes to reach the ground is 2.6 s, then the acceleration due to gravity isA. 9 m s-2B. 10 m s-2C. 4 m s-2D. 8.8 m s-2

Description : If a student drops a stone from a cliff of height 30 m and the time it takes to reach the ground is 2.6 s, then the acceleration due to gravity isA. 9 m s-2 B. 10 m s-2 C. 4 m s-2 D. 8.8 m s-2

Last Answer : 8.8 m s-2

An iron sphere of mass 30 kg and an aluminium sphere of mass 10 kg, both having the same diameter are dropped vertically from a cliff. When they are 10 metrs from the ground, they have identical a.Accelerations b.Momenta c.Kinetic energies d.Potential energies e.All of the above

Description : An iron sphere of mass 30 kg and an aluminium sphere of mass 10 kg, both having the same diameter are dropped vertically from a cliff. When they are 10 metrs from the ground, they have identical a.Accelerations b.Momenta c.Kinetic energies d.Potential energies e.All of the above

Last Answer : a. Accelerations

In fireworks the momentum provided by chemicals is directed A. upwards B. left side C. right side D. downwards

Description : In fireworks the momentum provided by chemicals is directed A. upwards B. left side C. right side D. downwards

Last Answer : downwards

When released from certain height why do objects tend to fall vertically downwards?

Description : When released from certain height why do objects tend to fall vertically downwards?

Last Answer : When released from certain height why do objects tend to fall vertically downwards?

A man lifts a stone weighting 300 g from the ground to a height of 2m and throws it horizontally with a velocity of 6 m/sec. The work done by the man is a.7.686 J b.11.286 J c.5.886 J d.8.343 J e.Tapered bearing

Description : A man lifts a stone weighting 300 g from the ground to a height of 2m and throws it horizontally with a velocity of 6 m/sec. The work done by the man is a.7.686 J b.11.286 J c.5.886 J d.8.343 J e.Tapered bearing

Last Answer : b. 11.286 J

Two stones of different masses are dropped simultaneously from the top of a building – (1) Smaller stone reaches the ground earlier (2) Larger stone reaches the ground earlier (3) Both the stones reach the ground at the same time (4) Depends on the composition of the stone

Description : Two stones of different masses are dropped simultaneously from the top of a building – (1) Smaller stone reaches the ground earlier (2) Larger stone reaches the ground earlier (3) Both the stones reach the ground at the same time (4) Depends on the composition of the stone

Last Answer : (3) Both the stones reach the ground at the same time Explanation: Both stones at the same Lime. The initial speed is 0 for both stones, and the only acceleration working in that system would be g ... way across the air. The shape of the falling object will decide the force needed to open that way.

Two stones of different masses are dropped simultaneously from the top of a building (1) Smaller stone reaches the ground earlier (2) Larger stone reaches the ground earlier (3) Both the stones reach the ground at the same time (4) Depends on the composition of the stone

Description : Two stones of different masses are dropped simultaneously from the top of a building (1) Smaller stone reaches the ground earlier (2) Larger stone reaches the ground earlier (3) Both the stones reach the ground at the same time (4) Depends on the composition of the stone

Last Answer : Both the stones reach the ground at the same time

A dumpy level was set up at the midpoint between two pegs A and B, 50 m apart and the staff readings at and were 1.22 and 1.06. With the level set up at , the readings at and were 1.55 and 1.37. The collimation error per 100 m length of sight is (A) 0.02 m inclined upwards (B) 0.04 m inclined downwards (C) 0.04 m inclined upward (D) None of these

Description : A dumpy level was set up at the midpoint between two pegs A and B, 50 m apart and the staff  readings at and were 1.22 and 1.06. With the level set up at , the readings at  and were 1.55 and ... upwards  (B) 0.04 m inclined downwards  (C) 0.04 m inclined upward  (D) None of these

Last Answer : (B) 0.04 m inclined downwards 

Two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively and they cross each other in 23 seconds. The ratio of their speeds is: A.1 : 3 B.3 : 4 C.3 : 2 D.Data inadequate E.None of these

Description : Two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively and  they cross each other in 23 seconds. The ratio of their speeds is: A.1 : 3 B.3 : 4 C.3 : 2 D.Data inadequate E.None of these

Last Answer : Answer - C (3 : 2) Explanation - Let the speeds of the two trains be x m/sec and y m/sec respectively. Then, length of the first train = 27x metres, and length of the second train = 17y metres. relative speed = total ... 23x + 23y = 27x + 17 y 27x-23x= 23 y-17y 4x=6y x/y=6/4=3/2= 3:2

The tension in the wire rope supporting a lift moving with a uniform velocity a.Is more when the lift is moving upwards b.Is more when the lift is moving downwards c.Is less when the lift is moving down-wards d.Is less when the lift is moving upwards e.Remains constant irrespective of the lift movement

Description : The tension in the wire rope supporting a lift moving with a uniform velocity a.Is more when the lift is moving upwards b.Is more when the lift is moving downwards c.Is less when the lift ... down-wards d.Is less when the lift is moving upwards e.Remains constant irrespective of the lift movement

Last Answer : e. Remains constant irrespective of the lift movement

Do stalactites grow upwards or downwards?

Description : Do stalactites grow upwards or downwards?

Last Answer : Downwards

Charges filled inside a cylindrical will possess flux in which direction? a) Upwards b) Downwards c) Laterally outwards d) Inwards

Description : Charges filled inside a cylindrical will possess flux in which direction? a) Upwards b) Downwards c) Laterally outwards d) Inwards

Last Answer : c) Laterally outwards

In order to measure the flow with a Venturimeter, it is installed in (A) Horizontal line (B) Inclined line with flow upwards (C) Inclined line with flow downwards (D) Any direction and in any location

Description : In order to measure the flow with a Venturimeter, it is installed in (A) Horizontal line (B) Inclined line with flow upwards (C) Inclined line with flow downwards (D) Any direction and in any location

Last Answer : Answer: Option D

Normally the isoquant slopes (a) downwards from left to right (b) upward from right to left © upwards from left to right (d) backwards from left to right

Description : Normally the isoquant slopes (a) downwards from left to right (b) upward from right to left © upwards from left to right (d) backwards from left to right

Last Answer : (a) downwards from left to right

An increase in marginal propensity to consume will (a) Lead to the consumption function becoming steeper. (b) Shift the consumption function upwards. © Shift the consumption function downwards. (d) Shift the savings function upwards.

Description : An increase in marginal propensity to consume will (a) Lead to the consumption function becoming steeper. (b) Shift the consumption function upwards. © Shift the consumption function downwards. (d) Shift the savings function upwards.

Last Answer : d) Lead to the consumption function becoming steeper.

A man is standing near the edge of a uniformly rotating platform about an axis passing through its centre. The speed of rotation of the platform will decrease if he a.extends his arms outwards b.moves towards the axis of rotation c.jumps out from the platform d.accepts a heavy bag from one of his friends standing near by and holds it in his hand e.107 dynes

Description : A man is standing near the edge of a uniformly rotating platform about an axis passing through its centre. The speed of rotation of the platform will decrease if he a.extends his arms outwards b.moves ... heavy bag from one of his friends standing near by and holds it in his hand e.107 dynes

Last Answer : d. accepts a heavy bag from one of his friends standing near by and holds it in his hand

A girl throws a 2 kilogram rock vertically upward. It reaches a maximum height of 5 meters. What is the kinetic energy of the rock the instant it leaves the girl's hand?

Description : A girl throws a 2 kilogram rock vertically upward. It reaches a maximum height of 5 meters. What is the kinetic energy of the rock the instant it leaves the girl's hand?

Last Answer : ANSWER: 100 JOULES (accept 98 joules)

A girl throws a ball vertically upward, what is the MOMENTUM of the ball at its highest point?

Description : A girl throws a ball vertically upward, what is the MOMENTUM of the ball at its highest point?

Last Answer : ANSWER: ZERO

A boy throws a ball vertically upward with a velocity of 6 meters per second. How long does it take the ball to return to the boy's hand?

Description : A boy throws a ball vertically upward with a velocity of 6 meters per second. How long does it take the ball to return to the boy's hand?

Last Answer : ANSWER: 1.22 SECONDS (accept: 1.2 seconds)

The method of alighting the aeroplane on water during a ditching is to: a. Carry out a normal approach with flaps and gear selected as normal but to calculate all speeds plus 10kts b. Reduce the approach angle to 1.5deg (150ft/mile), add 15kts to all speeds, keep the aeroplane clean (no flaps or gear) and fly it into the surface c. Fly a normal approach but keep the gear up and land at lowest possible speed with the nose raised for the tail to strike first d. Fly a normal approach to stalling speed and then drop the aeroplane vertically onto the water

Description : The method of alighting the aeroplane on water during a ditching is to: a. Carry out a normal approach with flaps and gear selected as normal but to calculate all speeds plus 10kts b. Reduce ... d. Fly a normal approach to stalling speed and then drop the aeroplane vertically onto the water

Last Answer : c. Fly a normal approach but keep the gear up and land at lowest possible speed with the nose raised for the tail to strike first

A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The special mirror is made up of three types of mirrors in the following order from top downwards: (a) Convex, Plane, Concave (b) Plane, Convex, Concave (c) Concave, Plane, Convex (d) Convex, Concave, Plan

Description : A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The ... , Plane, Concave (b) Plane, Convex, Concave (c) Concave, Plane, Convex (d) Convex, Concave, Plan

Last Answer : (c) Concave, Plane, Convex

You visit the Grand Canyon and drop a quarter off the edge of a cliff. The quarter falls 16 feet the first second, 48 feet the next second, 80 feet the third second, and so on. If the quarter fell 9 seconds before hitting the ground, how far down is it?

Description : You visit the Grand Canyon and drop a quarter off the edge of a cliff. The quarter falls 16 feet the first second, 48 feet the next second, 80 feet the third second, and so on. If the quarter fell 9 seconds before hitting the ground, how far down is it?

Last Answer : an=a1+(n-1)dan=16+(6-1)32=176The 6th term is 176. Now we are ready to find the sum:

Pick up the correct statement from the following: (A) The lines of sight while observing back sight and fore sight lie in the same horizontal plane (B) The staff readings are measurements made vertically downwards from a horizontal plane (C) The horizontal plane with reference to which staff readings are taken, coincides with the level surface through the telescope axis (D) All the above

Description : Pick up the correct statement from the following: (A) The lines of sight while observing back sight and fore sight lie in the same horizontal plane (B) The staff readings are measurements made ... readings are taken, coincides with the level surface through the telescope axis (D) All the above

Last Answer : (D) All the above

Two stones of unequal masses are thrown vertically up with the same velocity. Which of the following will happen? (1) The heavier mass will reach greater height (2) The lighter mass will reach greater height (3) Both will reach the same height (4) Any of them may reach greater height

Description : Two stones of unequal masses are thrown vertically up with the same velocity. Which of the following will happen? (1) The heavier mass will reach greater height (2) The lighter mass will reach greater height (3) Both will reach the same height (4) Any of them may reach greater height

Last Answer : (3) Both will reach the same height Explanation: Galileo's experiment showed that if two bodies of unequal masses are dropped from the same height, the time required by them to reach the ground are equal ... reach the ground is equal to unity. This means that both of them will reach the same height.

Two stones of unequal masses are thrown vertically up with the same velocity. Which of the following will happen? (1) The heavier mass will reach greater height (2) The lighter mass will reach greater height (3) Both will reach the same height (4) Any of them may reach greater height

Description : Two stones of unequal masses are thrown vertically up with the same velocity. Which of the following will happen? (1) The heavier mass will reach greater height (2) The lighter mass will reach greater height (3) Both will reach the same height (4) Any of them may reach greater height

Last Answer : Both will reach the same height

If you were falling off a cliff on a horse and right before the horse hit the ground you jumped on the horses back. Would you take damage like you fell from the cliff or only the 5 feet or whatever that you jumped up in the air from the horse?

Description : If you were falling off a cliff on a horse and right before the horse hit the ground you jumped on the horses back. Would you take damage like you fell from the cliff or only the 5 feet or whatever that you jumped up in the air from the horse?

Last Answer : You would still get hurt, but you'd be less hurt than if you landed directly on the ground.

A stone is thrown upwards with initial velocity of 20 m s-1, the height that stone will reach would be A. 20 m B. 30 m C. 40 m D. 50 m

Description : A stone is thrown upwards with initial velocity of 20 m s-1, the height that stone will reach would be A. 20 m B. 30 m C. 40 m D. 50 m

Last Answer : 20 m

A bullet is fired vertically upwards with a velocity of 2200 ft/s. Bullet ascends to a height of a.56,900 ft b.107 dynes c.75,000 ft d.48.300 ft e.65,800 ft

Description : A bullet is fired vertically upwards with a velocity of 2200 ft/s. Bullet ascends to a height of a.56,900 ft b.107 dynes c.75,000 ft d.48.300 ft e.65,800 ft

Last Answer : c. 75,000 ft

A ball weighing 250 gm is thrown vertically upwards with a velocity of 980 cm/sec. The time that the ball will take to return back to earth would be a.1 sec b.4 sec c.2 sec d.5 sec e.3 sec

Description : A ball weighing 250 gm is thrown vertically upwards with a velocity of 980 cm/sec. The time that the ball will take to return back to earth would be a.1 sec b.4 sec c.2 sec d.5 sec e.3 sec

Last Answer : c. 2 sec

A ball thrown vertically upwards from a point P on earth reaches a point Q and returns back to earth striking at a point R.

Description : A ball thrown vertically upwards from a point P on earth reaches a point Q and returns back to earth striking at a point R.

Last Answer : A ball thrown vertically upwards from a point P on earth reaches a point Q and returns back to ... the motion of the ball (Neglect air resistance).

In a solid arch, shear force acts (A) Vertically upwards (B) Along the axis of the arch (C) Perpendicular to the axis of arch (D) Tangentially to the arch

Description : In a solid arch, shear force acts (A) Vertically upwards (B) Along the axis of the arch (C) Perpendicular to the axis of arch (D) Tangentially to the arch

Last Answer : (C) Perpendicular to the axis of arch

The resultant of all normal pressures acts (A) At C.G. of body (B) At center of pressure (C) Vertically upwards (D) At metacentre

Description : The resultant of all normal pressures acts (A) At C.G. of body (B) At center of pressure (C) Vertically upwards (D) At metacentre

Last Answer : Answer: Option C

A helicopter is ascending vertically with a constant speed of 6 meters per second relative to the ground. At the instant the helicopter is 60 meters above the ground it releases a package. What is the magnitude and direction of the velocity of the package, relative to the ground, the instant the package is released by the helicopter?

Description : A helicopter is ascending vertically with a constant speed of 6 meters per second relative to the ground. At the instant the helicopter is 60 meters above the ground it releases a package. What is ... of the package, relative to the ground, the instant the package is released by the helicopter?

Last Answer : ANSWER: 6 METERS/SECOND UP

What is Lou Carson drinking just before he goes over a cliff in the film 'Jesse Stone Night Passage'?

Description : What is Lou Carson drinking just before he goes over a cliff in the film 'Jesse Stone Night Passage'?

Last Answer : What is the answer ?

A stone is thrown up from the foot of tower 50 m high with a velocity of 25 m/sec and at the same time another stone is dropped from the top of tower, the two stones will cross each other after a.3 sec b.5 sec c.4 sec d.4.5 sec e.2 sec

Description : A stone is thrown up from the foot of tower 50 m high with a velocity of 25 m/sec and at the same time another stone is dropped from the top of tower, the two stones will cross each other after a.3 sec b.5 sec c.4 sec d.4.5 sec e.2 sec

Last Answer : e. 2 sec

In a 2280 m race Dinesh beats Aarav by 360 m or 6 seconds. In another race on the same track at the same speeds. Aarav and karthick start at one end while Dinesh starts at the opposite end. How many metres would Aarav have covered ,by the time Dinesh meets karthick given that Dinesh speed is 16 m/sec more than that of karthick a) 1140 m b) 2280 m c) 2460 m d) 1180 m

Description : In a 2280 m race Dinesh beats Aarav by 360 m or 6 seconds. In another race on the same track at the same speeds. Aarav and karthick start at one end while Dinesh starts at the opposite end. How many metres would Aarav ... is 16 m/sec more than that of karthick a) 1140 m b) 2280 m c) 2460 m d) 1180 m

Last Answer : B Aarav 's speed =360/6 =60 m/s Time taken by Aarav to cover 2280 m =2280/60= 38 seconds Dinesh 's speed = 2280/60=38 m/s karthick 's speed = 22m/s Time taken by Dinesh to meet karthick in ... direction: Distance covered by Aarav: =2280/(38+22) =2280/60 =38 seconds =(38*60)m =2280 m

It is the western shore of Hawaii and I stand on the edge of a cliff... will you join me?

Description : It is the western shore of Hawaii and I stand on the edge of a cliff... will you join me?

Last Answer : What a relief! I thought you were going to jump! But I have to say no to your invitation. I don’t have anything to throw over the edge and I no longer can drink. But thanks for the offer. I hope a lot of people will take you up on your offer.

What is the kinetic energy of a 50 newton object resting on the edge of a cliff 30 meters high before it fell?

Description : What is the kinetic energy of a 50 newton object resting on the edge of a cliff 30 meters high before it fell?

Last Answer : What is the answer ?

What is the potential energy of a 50 newton object resting on the edge of the cliff 30 meters high?

Description : What is the potential energy of a 50 newton object resting on the edge of the cliff 30 meters high?

Last Answer : 1500 joules