MDCAT Physics Chapter 3 online mcq test with answers for chapter 3 (Rotational and Circular Motion)

Question # 1

An elevator's motor produces 3000 W power. The speed With Which it can lift a 1000 kg load is:

30.6ms^-1 A
0.306ms^-1 B
3.06ms^-1 C
300.3ms^-1 D

Question # 2

A body is dropped from a height of 20 m and rebounds to a height of 10 m. the loss of energy is:

10% A
45% B
50% C
75% D

Question # 3

If the stone is thrown up vertically and return to ground, its potential energy is maximum

during the upward journey A
during the upward journey B
at the maximum height C
at the bottom D

Question # 4

An electric motor exerts a force of 40 N on a cable and pulls it by a distance of 30 m in one minute. The power supplied by the motor in watts is

20 A
200 B
2 C
10 D

Question # 5

A man M₁ of mass 80 kg runs up a staircase in 15s. Another man M₂ also of mass 80 kg runs up the same staircase in 20s. The ratio of the power developed by them will be

1 A
4/3 B
16/9 C
none of these D

Question # 6

The gravity does no work, when the body moves:

Horizontally A
Vertically upwards B
Vertically downward C
At an angle of 45o with horizontal D

Question # 7

If the K.E. of a body is increased by 300%, its momentum will increase by:

100 % A
150 % B
√300% C
175 % D

Question # 8

A man weighing 500 N carries a load of 10 kg to the top of a building in 4 minutes. The work done by the man is 6 × 𝟏𝟎⁴ J. If he carries the same load in 8 minutes, the work done by the man will be:

3 × 10⁴ J A
6 × 10⁴J B
9 × 10⁴J C
12× 10⁴ J
D

Question # 9

Ratio of dimension of K.E and power is:

1:1 A
T:1 B
1:T C
M:J D

Question # 10

You lift a heavy book from the floor of the room and keep it in the book-shelf having a height 2 m. In this process you take 5 seconds. The work done by you will depend upon:

Mass of the book and time taken A
Weight of the book and height of the book-shelf B
Height of the book-shelf and time taken C
Mass of the book, height of the book-shelf and time taken D

Question # 11

If the velocity of a body becomes half, the kinetic energy of body will become

One fourth A
Double B
Four times C
Half D

Question # 12

The body at rest may have:

Energy A
Momentum B
Speed C
Velocity D

Question # 13

When the velocity of a body is doubled:

Its K.E is doubled A
Its P.E is doubled B
Its momentum is doubled C
Its acceleration is doubled D

Question # 14

The momentum of a particle is numerically equal to its K.E. What is the velocity of a particle?

9 ms^-1 A
3 ms^-1 B
2 ms-1 C
1 ms^-1 D

Question # 15

The same retarding force is applied to stop a train. The train stops after 80 m. If the speed is doubled, then the Stopping distance will be:

The same A
Doubled B
Halved C
Four times D

Question # 16

. A force "F1" acts on a body through distance "S1" in the direction of motion and does work "W1". Similarly another force "F2" act on same body through distance "S2" but in opposite to the direction of motion and does work "W2". Now if F1 = F2 and S1 = S2 then which statement is correct.

W1 = W2 A
W2< W2 B
W1 > W2 C
W1 = W2= 0 D

Question # 17

Which of the following types of force can do no work on the particle on which it acts?

Frictional force A
Gravitational force B
Elastic force C
Centripetal force D

Question # 18

A light and a heavy body have equal momenta. Which one has greater K.E?

The light body A
The heavy body B
The K.E are equa C
Data is incomplete D

Question # 19

Which of the following is a unit of energy?

unit A
whatt B
Horse Power C
None of the above D

Question # 20

A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 joules, the angle which the force makes with the direction of motion of the body is?

0 Degree A
30 Degree B
60 Degree C
90 Degree D

Sr.#	Question	Answer
1	If the stone is thrown up vertically and return to ground, its potential energy is maximum	A. during the upward journey B. during the upward journey C. at the maximum height D. at the bottom
2	A 50 kg man with 20 kg load on his head climbs up 20 steps of 0.25 m height each. The work done in climbing is	A. 5 J B. 350 J C. 100 J D. 3430 J
3	The gravity does no work, when the body moves:	A. Horizontally B. Vertically upwards C. Vertically downward D. At an angle of 45o with horizontal
4	A body of mass m kg is lifted by a man to a height of one meter in 30 sec. Another man lifts the same mass to the same height in 60 sec. The work done by them are in the ratio	A. 1: 2 B. 1: 1 C. 2: 1 D. 4: 1
5	. A force "F1" acts on a body through distance "S1" in the direction of motion and does work "W1". Similarly another force "F2" act on same body through distance "S2" but in opposite to the direction of motion and does work "W2". Now if F1 = F2 and S1 = S2 then which statement is correct.	A. W1 = W2 B. W2< W2 C. W1 > W2 D. W1 = W2= 0
6	An elevator's motor produces 3000 W power. The speed With Which it can lift a 1000 kg load is:	A. 30.6ms^-1 B. 0.306ms^-1 C. 3.06ms^-1 D. 300.3ms^-1
7	The time taken by an engine of power 10 kW to lift a mass of 200 kg to a heightof 40 m is (g + 10ms2)	A. 2 sec B. 4 sec C. 8 sec D. 16sec
8	A force of 6 N act horizontally on a stationary mass of 2kg for 4s. The kineticenergy in joule is	A. 12 B. 72 C. 56 D. 888
9	The same retarding force is applied to stop a train. The train stops after 80 m. If the speed is doubled, then the Stopping distance will be:	A. The same B. Doubled C. Halved D. Four times
10	The body at rest may have:	A. Energy B. Momentum C. Speed D. Velocity

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MDCAT Physics Chapter 3 MCQ Test With Answer for ( Work ,Energy & Power)

MCQ's Test For MDCAT Physics Chapter 3 Work ,Energy & Power Online Test

MDCAT Physics Chapter 3 Work ,Energy & Power Online Test

An elevator's motor produces 3000 W power. The speed With Which it can lift a 1000 kg load is:

A body is dropped from a height of 20 m and rebounds to a height of 10 m. the loss of energy is:

If the stone is thrown up vertically and return to ground, its potential energy is maximum

An electric motor exerts a force of 40 N on a cable and pulls it by a distance of 30 m in one minute. The power supplied by the motor in watts is

A man M1 of mass 80 kg runs up a staircase in 15s. Another man M2 also of mass 80 kg runs up the same staircase in 20s. The ratio of the power developed by them will be

The gravity does no work, when the body moves:

If the K.E. of a body is increased by 300%, its momentum will increase by:

A man weighing 500 N carries a load of 10 kg to the top of a building in 4 minutes. The work done by the man is 6 × 𝟏𝟎4 J. If he carries the same load in 8 minutes, the work done by the man will be:

Ratio of dimension of K.E and power is:

You lift a heavy book from the floor of the room and keep it in the book-shelf having a height 2 m. In this process you take 5 seconds. The work done by you will depend upon:

If the velocity of a body becomes half, the kinetic energy of body will become

The body at rest may have:

When the velocity of a body is doubled:

The momentum of a particle is numerically equal to its K.E. What is the velocity of a particle?

The same retarding force is applied to stop a train. The train stops after 80 m. If the speed is doubled, then the Stopping distance will be:

. A force "F1" acts on a body through distance "S1" in the direction of motion and does work "W1". Similarly another force "F2" act on same body through distance "S2" but in opposite to the direction of motion and does work "W2". Now if F1 = F2 and S1 = S2 then which statement is correct.

Which of the following types of force can do no work on the particle on which it acts?

A light and a heavy body have equal momenta. Which one has greater K.E?

Which of the following is a unit of energy?

A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 joules, the angle which the force makes with the direction of motion of the body is?

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A man M₁ of mass 80 kg runs up a staircase in 15s. Another man M₂ also of mass 80 kg runs up the same staircase in 20s. The ratio of the power developed by them will be

A man weighing 500 N carries a load of 10 kg to the top of a building in 4 minutes. The work done by the man is 6 × 𝟏𝟎⁴ J. If he carries the same load in 8 minutes, the work done by the man will be: