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

1 Answer

Answer :

20 m


Related questions

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

Description : A ball is thrown upwards with an initial velocity of 5 meters per second. How many seconds will it take to reach maximum height? w) 0.5 seconds x) 1 second y) 1.5 seconds z) 2 seconds

Last Answer : ANSWER: W -- 0.5 SECONDS

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).

Description : Horizontal distance travelled by a ball if it's thrown with initial velocity of 20 m s-1 at an angle of 30° is A. 24 m B. 56 m C. 35.3 m D. 36.3 m

Last Answer : 35.3 m

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

Description : A ball is thrown upwards and it goes to the height 100 m and comes down 1) What is the net displacement? 2) What is the net distance? Answer -Science

Last Answer : As it comes down to the initial point Net displacement is zero Net distance=200 m

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.

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

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

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

Description : Statistics , Problems with Two Projectors ? From the top of a 100 meter high tower an object is thrown at a 30 ° angle with a horizontal speed of 50 ms . At the same time another object from ... সাথে with the same velocity horizontally . At what time and at what height will the two objects meet ?

Last Answer : answer:

Description : Derive the formula for the range and maximum height achieved by a projectile thrown from the origin with initial velocity at an angel θ

Last Answer : Derive the formula for the range and maximum height achieved by a projectile thrown from the origin ... velocity at an angel θ to the horizontal.

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  

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

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

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

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).

Description : A stone thrown at an angle `theta` to the horizontal reaches a maximum height h. The time of flight of the stone is :-

Last Answer : A stone thrown at an angle `theta` to the horizontal reaches a maximum height h. The time of flight of the stone is ... )/(g))` D. ` sqrt((2h)/(g))`

Description : A stone is dropped into a deep shaft without any initial velocity. The sound of the stone hitting the bottom is heard after 4 seconds. If the velocity of sound is 330 m/sec the depth of the shaft will be a.33.1 m b.660 m c.165 m d.66.2 m e.330 m

Last Answer : d. 66.2 m

Description : A projectile is thrown at an angle of 30° to the horizontal. What should be the range of initial velocity (u)

Last Answer : A projectile is thrown at an angle of 30° to the horizontal. What should be the range of initial velocity (u) ... 40m and 50 m? Assume g = 10 m s-2.

Description : A gun barrel of mass 600 Kg has a recoil spring of stiffness 294 KN/m. If the barrel recoils 1.3 m on firing, what will be the initial recoil velocity of the barrel? (A) 28.77 m/s (B) 32.77 m/s (C) 35.77 m/s (D) 40.77 m/s

Last Answer : (A) 28.77 m/s

Description : Two army persons A and B each of weight of 500 N climb up a rope through a height of 10 m. A takes 20 s while B takes 40 s to achieve this task. What is ratio of the powers of person A and B? -Physics

Last Answer : The ratio of powers of A and B = 2: 1 Explanation : Where , Fa = 500N S = 10m Fb = 500N ta = 20s , tb = 40s Image solution

Description : A block of weight 20 kg slides with an initial velocity of 2 m sec down an inclined plane on to a spring of stiffness 10 kg/cm. If the co--efficient of friction is 0.2, angle ? = 30 the ratio of ... be a.More than one b.One c.Less than one d.Depends on the stiffness of spring e.None of the above

Last Answer : a. More than one

Description : A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, τ0 = 10 KPa, is shared between flat parallel plates separated by a distance of 10 -3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is (A) 10 KPa (B) 20 KPa (C) 30 KPa (D) 40 KPa

Last Answer : (B) 20 KPa

Description : Pick up the correct statement from the following: (A) The height of head light above road surface, is taken as 0.75 m (B) The beam of head light is up to one degree upwards from the grade of road (C) While designing the valley curve, the height of the object is assumed nil (D) All the above

Last Answer : Answer: Option D

Description : In which case power required would be more a.In lifting up a weight of 100 kg at a velocity of 3 m/sec but accelerating upwards at 0.5 m/sec b.In lowering a weight of 100 kg along an a inclined plane ... speed of 3 m/sec e.In lowering the weight at a velocity of 3 m/sec and acceleration of 1 m/sec2

Last Answer : a. In lifting up a weight of 100 kg at a velocity of 3 m/sec but accelerating upwards at 0.5 m/sec

Description : In a construction site, a crane lifts 1000 kg of concrete mix to roof top at a height of 20 meters in 50 seconds. If the value of gravity 'g' due to earth is 10 m s-2, the power of elevator will be. -Physics

Last Answer : 4 KW (kilowatt)

Description : A cylindrical ejector having its height 2 m fills after every 10 minutes with a peak sewage discharge of 0.0157 cumec. The diameter of the ejector chamber, is A. 2.30 m B. 2.40 m C. 2.45 m D. 2.50 m

Last Answer : ANS: C

Description : When a stone is thrown in the calm water of a pond the waves produced on the surface of water in the pond are – (1) longitudinal (2) transverse (3) both longitudinal and transverse (4) waves are not produced

Last Answer : (2) transverse Explanation: The waves produced on the surface of water in the pond is an example of transverse waves as particles of the medium do not move along with the wave. Only the disturbance is carried forward. Another example of such waves is the vibrations of a string.

Description : When a stone is thrown in the calm water of a pond the waves produced on the surface of water in the pond are (1) longitudinal (2) transverse (3) both longitudinal and transverse (4) waves are not produced

Last Answer : transverse

Description : The ozone layer is at height of----kilometers from the surface of the Earth? A. 10 to 20 B. 20 to 30 (Answer) C. 30 to 40 D. 40 to 50

Last Answer : B. 20 to 30 (Answer)

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

Description : A 2 m long shaft rotates about one end at 20 rad/s. It begins to accelerate with ? = 10 rads/s2. After how long, in seconds, will the velocity of the free end reach 100 m/s? a.3 b.107 dynes c.5 d.6 e.7

Last Answer : a. 3

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 

Description : The forced oil and air circulation method is usual one for transformers of capacities (a) upto 5 MVA (b) upto 10 MVA (c) upto 20 MVA (d) 30 MVA upwards

Last Answer : (d) 30 MVA upwards

Description : A particle moves along a rough plane inclined at 30? to the horizontal. The co-efficient of friction between the particle and the plane is 0.1. Its initial velocity is 15 m/sec. The ratio of the velocity of the particle when it move ... be in the regions a.8 ? 10 b.5 ? 7 c.2 ? 3 d.4 ? 6 e.10 ? 13

Last Answer : b. 5 ? 7

Description : A boys rows to a certain place and comes back, but by mistake he covers 2/3rd more distance while coming back. The total time for this journey is 20 hours. The ratio of speed of boat to that of ... starting point from his present position? A) 2hr 13mints B)1hr 30 mins C) 2hr 30mins D)1hr 40 mins

Last Answer : ANSWER : A Explanation: let speed of boat and stream be 2x and x respectively So downstream speed = 2x+x = 3x, and upstream speed = 2x-x = x Let total distance between points is d km So he covered d ... with speed 3x = 48 km/hr(downstream) So time is 80/36 * 60 = 133.33 minutes = 2hr 13mins

Description : To prevent segregation the concrete should to be thrown from a height of more than. (a) ½ m (b) 1m (c) 1.5m (d) 2m

Last Answer : (b) 1m

Description : Output current from an LED is A. 20 mA B. 30 mA C. 40 mA D. 50 mA

Last Answer : 20 mA

Description : A squid axon is placed on stimulating electrodes, and an intracellular electrode is inserted and connected through a cathode-ray oscilloscope (CRO) to an indifferent electrode. When the axon is stimulated, the latent ... . 40 m/s d. 67.5 m/s e. This cannot be determined from the information given

Last Answer : 30 m/s

Description : two persons a and b each of weight 500 n climb up a rope through a height of 10 m . a takes 20 s while b takes 40 s to achieve this task . what is the ratio of powers of a and b ? -Physics 9th

Last Answer : The ratio of powers of A and B = 2: 1 Explanation : Where , Fa = 500N S = 10m Fb = 500N ta = 20s , tb = 40s

Description : Two army persons A and B each of weight of 500 N climb up a rope through a height of 10 m. A takes 20 s while B takes 40 s to achieve this task. -Physics 9th

Last Answer : The ratio of powers of A and B = 2: 1 Explanation : Where , Fa = 500N S = 10m Fb = 500N ta = 20s , tb = 40s

Description : In a business, X,Y and Z inversed Rs.20,000/-,Rs.30,000/- and Rs.40,000/- respectively. After 1 year X adds Rs.10000/- to the initial investment.Y and Z withdrew Rs.10000/- and Rs.15,000/- respectively. After 2 years the total profit is Rs.9900/-. What is X’s share?. A) 3000 B) 2700 C) 3600 D) 4000

Last Answer : Answer: A)  X's Share = Rs.20000/- per first 1 year, Next year 10000/- added = Rs.20000/- 1 + Rs.30000/- 1 = Rs.50000/- Y's Share = Rs.30000/- per first 1 year, Next year 10000/- reduced = Rs.30000 ... /-  1 part------> Rs300/- Then, X's share is 10 parts = Rs.300/- 10 parts = Rs.3000/-

Description : What is the maximum velocity of a thrown object ?

Last Answer : Velocity is zero at the maximum height of the thrown object.

Description : A particle is thrown vertically upward. When it reaches the highest point, it has – (1) a downward acceleration (2) an upward acceleration (3) a downward velocity (4) a horizontal velocity

Last Answer : (1) a downward acceleration Explanation: When a particle is thrown vertically upwards in space, it will experience constant acceleration towards the ground (irrespective of the direction in which it ... point, it has zero velocity but has downward acceleration equal to acceleration due to gravity.

Description : A particle is thrown vertically upward. When it reaches the highest point, it has (1) a downward acceleration (2) an upward acceleration (3) a downward velocity (4) a horizontal velocity

Last Answer : a downward acceleration

Description : In a 2-mass 3 spring vibrating system the two masses each are of 9.8 kg coupling spring is having a stiffness of 3430 N/m whereas the other two springs have each a stiffness of 8820 N/m. The two natural frequencies in rad /sec are A) 10 & 20 B) 20 & 30 C) 30 & 40D) 40 & 50

Last Answer : C) 30 & 40

Description : From the point of tangency before an intersection, the route markers are fixed at a distance of (A) 15 m to 30 m (B) 20 m to 35 m (C) 40 m to 50 m (D) 100 m to 150

Last Answer : Answer: Option D

Description : Ravi walks to and fro to a Gym. He spends 30 minutes in gym. If he walks at speed of 20 km an hour, he returns to home at 8.00 a.m. If he walks at 30 km an hour, he returns to home at 7.30 a.m. How fast must he walk in order to return at 7.15 hours? a) 40 km/hr b) 30 km/hr c) 60 km/hr d) 50 km/hr

Last Answer :  A As per the question, let D be the total distance and ‘t’ is the time taken. So we have: D=20t 20t =30(t-0.5) 20t=30t-15 10t=15 t=3/2 D= 30 km Now, for the condition given we have: 30=S(t-3/4) 30=S(3/2-3/4) 30=S((6-3)/4) 30=S(3/4) S=40 km/hr

Description :  If a river flows from west to east with constant velocity of 1.0 m s-1 and a boat leaves south bank heading towards north with velocity of 2.40 m s-1, then resultant velocity of boat is A. 2.6 m s-1 B. 2.7 m s-1 C. 2.8 m s-1 D. 2.9 m s-1

Last Answer : 2.6 m s-1