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

Question # 1

The energy stored in wound watch spring is

K.E. A
P.E. B
heat energy C
chemical energy D

Question # 2

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 # 3

The power needed to lift amass of 5000g to height of 1min 2 second is

2.45 watt A
24.5 watt B
245 watt C
2.45 k watt D

Question # 4

A force 𝑭 = (𝟓𝒊̂+ 𝟑𝖩̂) newton is applied over a particle which displaces it from its origin to the point 𝒓 = (𝟐𝒊̂− 𝟏𝖩̂) meters. The work done on the particle is:

– 7 joules A
+13 joules B
+ 7 joules C
+11 joules D

Question # 5

Which of the following is a unit of energy?

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

Question # 6

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 # 7

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

Question # 8

Car X is traveling at half the speed of car Y. Car X has twice mass of car Y.
Which statement is correct?

Car X has half the kinetic energy of car Y A
Car X has one quarter of the kinetic energy of car Y B
Car X has twice the kinetic energy of car Y C
The tow cars have the same kinetic energy D

Question # 9

An engine pumps out 40 kg of water in one second. The water comes out vertically upwards with a velocity of 3ms-1 . What is the power of engine in kilowatt?

1.2kW A
120kW B
12kW C
1200kW D

Question # 10

A person weighing 20 mg walks on a level platform with a speed of 2 ms-1 . The work by the person against the force of gravity is:

Zero A
2J B
60J C
600J D

Question # 11

A force of 6 N act horizontally on a stationary mass of 2kg for 4s. The kineticenergy in joule is

12 A
72 B
56 C
888 D

Question # 12

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 # 13

A person holds a bucket of weight 60N. He walks 7 m along the horizontal path and then climbs up a vertical distance of 5 m. The work done by the man is:

300 N-m A
420 N-m B
720 N-m C
none of these D

Question # 14

In an explosion a body breaks up into two pieces of unequal masses. In this:

Both parts will have numerically equal momentum A
Lighter part will have more momentum B
Heavier part will have more momentum C
Both parts will have equal kinetic energy D

Question # 15

A man pushes a wall and fails to displace it. He does:

Negative work A
Positive but not maximum work B
No work at all C
Maximum work D

Question # 16

3 joules of work is done in 3 seconds, then power is:

6 watt A
3 watt B
18 watt C
1 watt D

Question # 17

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 # 18

When a person lifts a body from ground work done by lifting force is?

Positive A
Negative B
Zero C
Half of positive maximum D

Question # 19

Initially, four identical uniform blocks, each of mass m and thickness h, are spread on a table How much work is done on the blocks in stacking them on top of one another?

2 mgh A
3 mgh B
4mgh C
6mgh D

Question # 20

You lift a suit case from the floor and keep it on a table. The work done by you on the suitcase does not depend on

the path taken by the suitcase A
weight of the suitcase B
initial and final position C
None D

Sr.#	Question	Answer
1	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?	A. 0 Degree B. 30 Degree C. 60 Degree D. 90 Degree
2	The momentum of a particle is numerically equal to its K.E. What is the velocity of a particle?	A. 9 ms^-1 B. 3 ms^-1 C. 2 ms-1 D. 1 ms^-1
3	A body is dropped from a height of 20 m and rebounds to a height of 10 m. the loss of energy is:	A. 10% B. 45% C. 50% D. 75%
4	If the K.E. of a body is increased by 300%, its momentum will increase by:	A. 100 % B. 150 % C. √300% D. 175 %
5	Kinetic energy of a body moving with speed of 10 ms-1 is 30 J. If its speed becomes30 ms-1 then its K.E becomes	A. 10J B. 270 J C. 90J D. 180 J
6	A motor boat is travelling with a speed of 3.0 m/sec. If the force on it due to water flow is 500 N, the power of the boat is	A. 150 KW B. 1.5 KW C. heat energy D. chemical energy
7	The power needed to lift amass of 5000g to height of 1min 2 second is	A. 2.45 watt B. 24.5 watt C. 245 watt D. 2.45 k watt
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	A force 𝑭 = (𝟓𝒊̂+ 𝟑𝖩̂) newton is applied over a particle which displaces it from its origin to the point 𝒓 = (𝟐𝒊̂− 𝟏𝖩̂) meters. The work done on the particle is:	A. – 7 joules B. +13 joules C. + 7 joules D. +11 joules
10	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. 1 B. 4/3 C. 16/9 D. none of these

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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

The energy stored in wound watch spring 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 power needed to lift amass of 5000g to height of 1min 2 second is

A force 𝑭 = (𝟓𝒊̂+ 𝟑𝖩̂) newton is applied over a particle which displaces it from its origin to the point 𝒓 = (𝟐𝒊̂− 𝟏𝖩̂) meters. The work done on the particle is:

Which of the following is a unit of energy?

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

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?

Car X is traveling at half the speed of car Y. Car X has twice mass of car Y.Which statement is correct?

An engine pumps out 40 kg of water in one second. The water comes out vertically upwards with a velocity of 3ms-1 . What is the power of engine in kilowatt?

A person weighing 20 mg walks on a level platform with a speed of 2 ms-1 . The work by the person against the force of gravity is:

A force of 6 N act horizontally on a stationary mass of 2kg for 4s. The kineticenergy in joule is

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

A person holds a bucket of weight 60N. He walks 7 m along the horizontal path and then climbs up a vertical distance of 5 m. The work done by the man is:

In an explosion a body breaks up into two pieces of unequal masses. In this:

A man pushes a wall and fails to displace it. He does:

3 joules of work is done in 3 seconds, then power is:

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

When a person lifts a body from ground work done by lifting force is?

Initially, four identical uniform blocks, each of mass m and thickness h, are spread on a table How much work is done on the blocks in stacking them on top of one another?

You lift a suit case from the floor and keep it on a table. The work done by you on the suitcase does not depend on

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Test Questions

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

Car X is traveling at half the speed of car Y. Car X has twice mass of car Y.
Which statement is correct?