The apparent weight of a man in a lift is less the real weight when : (1) the lift is going up with an acceleration (2) the lift is going down with uniform speed (3) the lift is going up with uniform speed (4) the lift is going down with an acceleration

The apparent weight of a man in a lift is less the real weight when : (1) the lift is going up with an acceleration (2) the lift is going down with uniform speed (3) the lift is going up with uniform speed (4) the lift is going down with an acceleration
by

1 Answer

Answer :

the lift is going down with an acceleration
by

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The apparent weight of a man in a lift is less the real weight when – (1) the lift is going up with an acceleration (2) the lift is going down with uniform speed (3) the lift is going up with uniform speed (4) the lift is going down with an acceleration

Description : The apparent weight of a man in a lift is less the real weight when – (1) the lift is going up with an acceleration (2) the lift is going down with uniform speed (3) the lift is going up with uniform speed (4) the lift is going down with an acceleration

Last Answer : (4) the lift is going down with an acceleration Explanation: If the lift accelerates downwards with acceleration a, then the apparent weight of the man standing in the lift will be less than the ... upwards with acceleration, then the apparent weight of the man will be greater than his true weight.

The apparent weight of a person in a lift which is moving down with uniform acceleration is _______. (1) greater than the weight when the person is stationary (2) twice the weight when the person is stationary (3) less than the weight when the person is stationary (4) same as the weight when the person is stationary

Description : The apparent weight of a person in a lift which is moving down with uniform acceleration is _______. (1) greater than the weight when the person is stationary (2) twice the weight when the person ... than the weight when the person is stationary (4) same as the weight when the person is stationary

Last Answer : (3) less than the weight when the person is stationary

If lift is going up with acceleration, the apparent weight of a body is - (1) may be more or less than true weight (2) equal to the true weight (3) less than the true weight (4) more than the true weight

Description : If lift is going up with acceleration, the apparent weight of a body is - (1) may be more or less than true weight (2) equal to the true weight (3) less than the true weight (4) more than the true weight

Last Answer : (4) more than the true weight Explanation: If lift is going up with acceleration, the apparent weight of a body is more than the true weight.

If a lift is going up with acceleration, the apparent weight of a body is - (1) More or less the true weight (2) Equal to the true weight (3) Less than the true weight (4) More than the true weight

Description : If a lift is going up with acceleration, the apparent weight of a body is - (1) More or less the true weight (2) Equal to the true weight (3) Less than the true weight (4) More than the true weight

Last Answer : (4) More than the true weight Explanation: If a lift is going up with acceleration, the apparent weight of a body is more than the true weight.

If lift is going up with acceleration, the apparent weight of a body is - (1) may be more or less than true weight (2) equal to the true weight (3) less than the true weight (4) more than the true weight

Description : If lift is going up with acceleration, the apparent weight of a body is - (1) may be more or less than true weight (2) equal to the true weight (3) less than the true weight (4) more than the true weight

Last Answer : (4) more than the true weight Explanation: If lift is going up with acceleration, the apparent weight of a body is more than the true weight.

The apparent weight of a man in a lift is less than the real weight then

Description : The apparent weight of a man in a lift is less than the real weight then

Last Answer : When the lift is going down with acceleration.

A man is standing on a weighing machine in a lift which is moving. The weighing machine will show minimum reading when, the lift is moving A. In a free fall due to failure of the lift mechanism B. Upward with uniform acceleration C. Downward with uniform acceleration D. Upward with uniform speed

Description : A man is standing on a weighing machine in a lift which is moving. The weighing machine will show minimum reading when, the lift is moving A. In a free fall due to failure of the lift mechanism B. Upward with uniform acceleration C. Downward with uniform acceleration D. Upward with uniform speed

Last Answer : ANSWER: A

A man is standing on a weighing machine in a lift which is moving. The weighing machine will slow MINIMUM reading when, the lift is moving? A. Upward with uniform speed B. Downward with uniform acceleration C. In a free fall due to failure of the lift mechanism (Answer) D. None of these

Description : A man is standing on a weighing machine in a lift which is moving. The weighing machine will slow MINIMUM reading when, the lift is moving? A. Upward with uniform speed B. Downward with uniform acceleration C. In a free fall due to failure of the lift mechanism (Answer) D. None of these

Last Answer : C. In a free fall due to failure of the lift mechanism (Answer)

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

The motion of a body around a circular path is an example of – (1) Uniform velocity, variable acceleration (2) Uniform speed, uniform velocity (3) Uniform speed, variable velocity (4) Uniform speed, variable acceleration

Description : The motion of a body around a circular path is an example of – (1) Uniform velocity, variable acceleration (2) Uniform speed, uniform velocity (3) Uniform speed, variable velocity (4) Uniform speed, variable acceleration

Last Answer : (1) Uniform velocity, variable acceleration Explanation: Uniform circular motion occurs when a body moves in a circular path with constant velocity.

A particle is moving in a uniform circular motion with constant speed v along a circle of radius r. The acceleration-of the particle is – (1) zero (2) V/r (3) V/r² (4) V²/r

Description : A particle is moving in a uniform circular motion with constant speed v along a circle of radius r. The acceleration-of the particle is – (1) zero (2) V/r (3) V/r² (4) V²/r

Last Answer : (4) V²/r Explanation: When a particle is moving in a uniform circular motion with constant speed and radius. the acceleration of the particle is given by v2/r. The particle will exhibit centripetal acceleration.

The motion of a body around a circular path is an example of (1) Uniform velocity, variable acceleration (2) Uniform speed, uniform velocity (3) Uniform speed, variable velocity (4) Uniform speed, variable acceleration

Description : The motion of a body around a circular path is an example of (1) Uniform velocity, variable acceleration (2) Uniform speed, uniform velocity (3) Uniform speed, variable velocity (4) Uniform speed, variable acceleration

Last Answer : Uniform velocity, variable acceleration

A body whose true weight is 14 kg appears to weigh 15 kg when weighed with the help of a spring balance in a moving lift. The acceleration of the lift at the time was a.1 m/sec2 b.0.7 m/sec2 c.0.5 m/sec2 d.1.4 m/sec2 e.0.35 m/sec2

Description : A body whose true weight is 14 kg appears to weigh 15 kg when weighed with the help of a spring balance in a moving lift. The acceleration of the lift at the time was a.1 m/sec2 b.0.7 m/sec2 c.0.5 m/sec2 d.1.4 m/sec2 e.0.35 m/sec2

Last Answer : b. 0.7 m/sec2

Our weight will be zero under all of the following conditions EXCEPT a.107 dynes b.We are at the centre of the earth c.When we are ascending in a lift with acceleration of 4.9 m/s2 d.We are orbiting in a satellite e.When we are freely faling

Description : Our weight will be zero under all of the following conditions EXCEPT a.107 dynes b.We are at the centre of the earth c.When we are ascending in a lift with acceleration of 4.9 m/s2 d.We are orbiting in a satellite e.When we are freely faling

Last Answer : c. When we are ascending in a lift with acceleration of 4.9 m/s2

A lift of weight W is lifted by a rope with an acceleration f. If the area of cross-section of the rope is A, the stress in the rope is (A) [W (1 + f/G)]/A (B) (1 - g/f)/A (C) [W (2 + f/G)]/A (D) [W (2 + g/f)]/A

Description : A lift of weight W is lifted by a rope with an acceleration f. If the area of cross-section of the rope  is A, the stress in the rope is  (A) [W (1 + f/G)]/A (B) (1 - g/f)/A (C) [W (2 + f/G)]/A (D) [W (2 + g/f)]/A

Last Answer : (A) [W (1 + f/G)]/A

For body moving with non-uniform velocity and uniform acceleration – (1) Displacement – Time graph (2) Displacement – Time graph (3) Velocity - Time graph is non-linear (4) Velocity - Time graph is linear

Description : For body moving with non-uniform velocity and uniform acceleration – (1) Displacement – Time graph (2) Displacement – Time graph (3) Velocity - Time graph is non-linear (4) Velocity - Time graph is linear

Last Answer : (2) Displacement - Time graph Explanation: Displacement-time graph is non linear. Linear motion (also called rectilinear motion) is motion along a straight line, and can therefore be described ... linear motion with variable velocity or non-zero acceleration. The motion of a particle (a point

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Description : Assuming uniform density of the core, the acceleration due to gravity below the Earth's surface is A. inversely proportional to the square of the distance from the center of the Earth ... center of the Earth D. directly proportional to the distance from the center of the Earth

Last Answer : directly proportional to the distance from the center of the Earth

For an object moving in uniform circular motion, the direction of the instantaneous acceleration vector is: w) tangent to the path of motion x) equal to zero y) directed radially outward z) directed radially inward

Description : For an object moving in uniform circular motion, the direction of the instantaneous acceleration vector is: w) tangent to the path of motion x) equal to zero y) directed radially outward z) directed radially inward

Last Answer : ANSWER: Z -- DIRECTED RADIALLY INWARD

For a body moving with non-uniform velocity and uniform acceleration (1) Displacement – Time graph is linear (2) Displacement – Time graph is non-linear (3) Velocity – Time graph is nonlinear (4) Velocity – Time graph is linear

Description : For a body moving with non-uniform velocity and uniform acceleration (1) Displacement – Time graph is linear (2) Displacement – Time graph is non-linear (3) Velocity – Time graph is nonlinear (4) Velocity – Time graph is linear

Last Answer : Displacement – Time graph is non-linear

A cage weighing 200 kg is lowered down a mine shaft with uniform acceleration. In the first 5 sec the cage reaches a depth of 20 m. The tension in the cord lowering the cage would be a.836 kg b.167.2 kg c.100 kg d.41.8 kg e.200 kg

Description : A cage weighing 200 kg is lowered down a mine shaft with uniform acceleration. In the first 5 sec the cage reaches a depth of 20 m. The tension in the cord lowering the cage would be a.836 kg b.167.2 kg c.100 kg d.41.8 kg e.200 kg

Last Answer : b. 167.2 kg

A satellite moving round the earth with a uniform speed has _____? A. An accelerated motion B. No acceleration at all C. Uniform acceleration D. Uneven acceleration

Description : A satellite moving round the earth with a uniform speed has _____? A. An accelerated motion B. No acceleration at all C. Uniform acceleration D. Uneven acceleration

Last Answer : ANSWER: C

A satellite moving round the earth with a uniform speed has------? A. An accelerated motion B. No acceleration at all C. Uniform acceleration (Answer) D. Uneven acceleration

Description : A satellite moving round the earth with a uniform speed has------? A. An accelerated motion B. No acceleration at all C. Uniform acceleration (Answer) D. Uneven acceleration

Last Answer : C. Uniform acceleration (Answer)

a particle moves with uniform velocity. Which o fthe following statements about the motion of the particle is true. (a) its speed is zero. (b) its acceleration is zero. © its acceleration is opposite to the velocity. (d) its speed may be variable

Description : a particle moves with uniform velocity. Which o fthe following statements about the motion of the particle is true. (a) its speed is zero. (b) its acceleration is zero. © its acceleration is opposite to the velocity. (d) its speed may be variable

Last Answer : Its acceleration is zero

A particle moving with uniform speed can possess : (a) radial acceleration (b) tangential acceleration © both radial and tangential accelerations (d) neither radial nor tangential acceleration

Description : A particle moving with uniform speed can possess :  (a) radial acceleration (b) tangential acceleration © both radial and tangential accelerations (d) neither radial nor tangential acceleration

Last Answer : Neither radial nor tangential... as if it move in a straight line.. but it possess radial acceleration if it moves in a uniform circular path

A uniform cylinder of weight W is rolling while slipping on a rough horizontal surface under the influence of a horizontal force. The force of friction between the cylinder and the surface is a.Proportional to the coefficient of static friction b.Proportional to the coefficient of dynamic friction c.Indeterminate d.Determinate but depends on the acceleration of the cylinder e.None of the above

Description : A uniform cylinder of weight W is rolling while slipping on a rough horizontal surface under the influence of a horizontal force. The force of friction between the cylinder and the surface is a. ... c.Indeterminate d.Determinate but depends on the acceleration of the cylinder e.None of the above

Last Answer : c. Indeterminate

A uniform cylinder of weight W is rolling while slipping on a rough horizontal surface under the influence of a horizontal force. The force of friction between the cylinder and the surface is a.Indeterminate b.Proportional to the coefficient of dynamic friction c.Determinate but depends on the acceleration of the cylinder d.107 dynes e.Proportional to the coefficient of static friction

Description : A uniform cylinder of weight W is rolling while slipping on a rough horizontal surface under the influence of a horizontal force. The force of friction between the cylinder and the surface is a. ... on the acceleration of the cylinder d.107 dynes e.Proportional to the coefficient of static friction

Last Answer : c. Determinate but depends on the acceleration of the cylinder

For a body floating in water, the apparent weight is equal to - (1) Actual weight of the body (2) Zero (3) Weight of the body minus weight of the liquid (4) Weight of the body plus upward thrust

Description : For a body floating in water, the apparent weight is equal to - (1) Actual weight of the body (2) Zero (3) Weight of the body minus weight of the liquid (4) Weight of the body plus upward thrust

Last Answer : (3) Weight of the body minus weight of the liquid

Water rises in a capillary tube to a height h. It will rise to a height more than h. a.in a lift moving up with an acceleration b.in all the above cases c.107 dynes d.at the poles e.on the surface of moon

Description : Water rises in a capillary tube to a height h. It will rise to a height more than h. a.in a lift moving up with an acceleration b.in all the above cases c.107 dynes d.at the poles e.on the surface of moon

Last Answer : e. on the surface of moon

A block of wood is floating in a lake. The apparent weight of the floating block is (a) Zero (b) Equal to its true weight (c) More than its true weight (d) Less than its true weight

Description : A block of wood is floating in a lake. The apparent weight of the floating block is (a) Zero (b) Equal to its true weight (c) More than its true weight (d) Less than its true weight

Last Answer : Ans:(a)

If flaps are lowered during the take-off run: a. The lift would not change until the aircraft is airborne b. The lift would increase when the flaps are lowered c. The lift would decrease d. The acceleration would increase

Description : If flaps are lowered during the take-off run: a. The lift would not change until the aircraft is airborne b. The lift would increase when the flaps are lowered c. The lift would decrease d. The acceleration would increase

Last Answer : b. The lift would increase when the flaps are lowered

If the angle of attack is increased beyond the critical angle of attack, the wing will no longer produce sufficient lift to support the weight of the aircraft: a. Unless the airspeed is greater than the normal stall speed b. Regardless of airspeed or pitch attitude c. Unless the pitch attitude is on or below the natural horizon d. In which case, the control column should be pulled-back immediately

Description : If the angle of attack is increased beyond the critical angle of attack, the wing will no longer produce sufficient lift to support the weight of the aircraft: a. Unless the airspeed is greater ... below the natural horizon d. In which case, the control column should be pulled-back immediately

Last Answer : b. Regardless of airspeed or pitch attitude

The resultant of a force acting on a body will be zero, if the body a.Rotates with uniform acceleration b.Moves along a curved path c.Rotates d.Does not rotate e.Rotates with uniform deceleration

Description : The resultant of a force acting on a body will be zero, if the body a.Rotates with uniform acceleration b.Moves along a curved path c.Rotates d.Does not rotate e.Rotates with uniform deceleration

Last Answer : d. Does not rotate

Obtain a relation for the distance travelled by an object moving with a uniform acceleration in the interval between 4th and 5th seconds -Physics 9th

Description : Obtain a relation for the distance travelled by an object moving with a uniform acceleration in the interval between 4th and 5th seconds -Physics 9th

Last Answer : Uniform acceleration in the interval between 4th and 5th seconds = = (5u + 1/2 * a * 5^2) - (4u + 1/2 * a * 4^2) = 5u + 1/2 *a * 25 - 4u + 1/2 * a * 16 = u + 1/2 * a * (25-16) = u + 1/2 * a * 9 = u + 9/2 * a If it starts from rest then the displacement will be 9/2a. hope this helps!

An electron moving with a velocity of 5 × 10 3 m / s enters into a uniform electric field and acquires a uniform acceleration of 10 3 m / s 2 in the direction of initial velocity. i. Find out the time in which electron velocity will be doubled.? ii. How much distance electron would cover in this time.? -Science

Description : An electron moving with a velocity of 5 10 3 m / s enters into a uniform electric field and acquires a uniform acceleration of 10 3 m / s 2 in the direction of initial velocity. i. ... which electron velocity will be doubled.? ii. How much distance electron would cover in this time.? -Science

Last Answer : Given u=5×103m/su=5×103m/s , a=103m/s2a=103m/s2, v=2u=104v=2u=104 m/s i.Using v=u+atv=u+at 104=5×103+103t104=5×103+103t or t=5 sec ii. Using s=ut+12at2s=ut+12at2 s=5×103×5+12×103×52s=5×103×5+12×103×52 =37.5×103m=37.5×103m

A object moves with uniform positive acceleration. Its velocity-time graph will be (a) A straight line parallel to the time axis (b) A straight line inclined at an obtuse angle to the time axis (c) A straight line inclined at an acute angle to the time axis (d) None of these. -Science

Description : A object moves with uniform positive acceleration. Its velocity-time graph will be (a) A straight line parallel to the time axis (b) A straight line inclined at an obtuse angle to the time axis (c) A straight line inclined at an acute angle to the time axis (d) None of these. -Science

Last Answer : Answer is (c)

The velocity, time graph of two bodies A and B travelling along the +x direction are given in the fi gure.(a) Are the bodies moving with uniform acceleration ? (b) Which body is moving with greater acceleration ? Give reasons. -Biology

Description : The velocity, time graph of two bodies A and B travelling along the +x direction are given in the fi gure.(a) Are the bodies moving with uniform acceleration ? (b) Which body is moving with greater acceleration ? Give reasons. -Biology

Last Answer : The acceleration is given by the slope of velocity-time graph. Slope of body-A > Slope of body-B as it forms a greater angle with time axis than body B. Thus, body A moves with higher acceleration

Derive equations of motion graphically for a particle having uniform acceleration, moving along a straight line.

Description : Derive equations of motion graphically for a particle having uniform acceleration, moving along a straight line.

Last Answer : Derive equations of motion graphically for a particle having uniform acceleration, moving along a straight line.

For uniform acceleration in rectilinear motion which of the following is not correct?

Description : For uniform acceleration in rectilinear motion which of the following is not correct?

Last Answer : For uniform acceleration in rectilinear motion which of the following is not correct? (A) ... displacement (D) Velocity-time graph is nonlinear

What is acceleration of a body moving with uniform velocity?

Description : What is acceleration of a body moving with uniform velocity?

Last Answer : zero because the initial and final velocity is constant . so,difference bet. final velocity and initial velocity is zero

A car starts from rest and moves on a straight road with a uniform acceleration of 10 m/s2 for the first 10 s. During the next 10 s, the car move s with the velocity it has attained. What is the total distance covered by the car in 20 s? (a) 500 m (b) 1000 m (c) 1,500 m (d) 2,000 m

Description : A car starts from rest and moves on a straight road with a uniform acceleration of 10 m/s2 for the first 10 s. During the next 10 s, the car move s with the velocity it has attained. What is the total distance covered by the car in 20 s? (a) 500 m (b) 1000 m (c) 1,500 m (d) 2,000 m

Last Answer : Ans:(c)

Air vessel provided in a reciprocating pump is for (A) Increasing the acceleration head (B) Making the friction in pipe uniform (C) Decreasing the acceleration head (D) None of these

Description : Air vessel provided in a reciprocating pump is for (A) Increasing the acceleration head (B) Making the friction in pipe uniform (C) Decreasing the acceleration head (D) None of these

Last Answer : (B) Making the friction in pipe uniform

Draw the following displacement diagram for follower: (i) SHM (ii) Uniform acceleration and deceleration

Description : Draw the following displacement diagram for follower: (i) SHM (ii) Uniform acceleration and deceleration

Last Answer : Displacement Diagram for Simple Harmonic Motion (SHM): Displacement Diagram for Uniform Acceleration and Deceleration:

A sample with excess Ar40 and atmosphere Are given an apparent age that is younger or older than the real age? why?

Description : A sample with excess Ar40 and atmosphere Are given an apparent age that is younger or older than the real age? why?

Last Answer : Homework questions are not really allowed here, on this site. Maybe someone will chime in, to say how you can go about finding the answer, but that’s about it. No straight answers.

The ratio of real depth to apparent depth is called : A. Refractive index B. Critical angle C. Lateral displacement D. None

Description : The ratio of real depth to apparent depth is called : A. Refractive index B. Critical angle C. Lateral displacement D. None

Last Answer : A. Refractive index

Formulas : Apparent Power , Real Power , Power factor

Description : Formulas : Apparent Power , Real Power , Power factor

Last Answer : Formulas: Apparent Power = VI (Voltmeter reading x Ammeter reading) Real Power = VI Cos Ф (Watt meter reading) Power factor (Cos Ф) = Real Power / Apparent Power Indicated Power = Observed ... Power -Actual Power) x100 /Actual Power Actual Power = Voltmeter reading x Ammeter reading x Power factor

Explain the terms real power, apparent power and reactive power for ac circuits and also the units used.

Description : Explain the terms real power, apparent power and reactive power for ac circuits and also the units used.

Last Answer : Real Power: It is the product of voltage, current and power factor i.e. P = V I cos j and basic unit of real power is watt. i.e. Expressed as W or kW. Apparent power: It is the product of ... X current X sinj or Reactive power = V I sin j and has no other unit but expressed in VAR or KVAR.

Define: (i) Apparent power (ii) Real power

Description : Define: (i) Apparent power (ii) Real power

Last Answer : (i) Apparent power It is the product of rms values of applied voltage and circuit current. Unit: volt-ampere (VA) OR kilo-volt-ampere (kVA) OR Mega-volt-ampere (MVA) S = VI = I2 Z volt ... circuit. (OR) It is the power which is actually dissipated in the circuit resistance.

A man exerts a northward force of 100 newtons on a 50 kilogram box which sits on a level floor. If the frictional force is 80 newtons, what is the magnitude of the northward acceleration of the box?

Description : A man exerts a northward force of 100 newtons on a 50 kilogram box which sits on a level floor. If the frictional force is 80 newtons, what is the magnitude of the northward acceleration of the box? 

Last Answer : ANSWER: 0.4 METERS PER SECOND SQUARED

Explain whether there is acceleration of a rotating object at a balanced speed in a circular motion ?

Description : Explain whether there is acceleration of a rotating object at a balanced speed in a circular motion ?

Last Answer : : In a circular path, there is no acceleration of the rotating object at a balanced speed The rate of change of unequal velocity is called acceleration. So if the velocity is balanced , there will be no acceleration Be it in a circular way or in a straight way.