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

Chapter 3 of Physics is an essential part of the MDCAT preparation. The students preparing for the exam must solve the MCQs available on this platform. For the convenience of the students, the answers are also uploaded here so the students can learn about their preparation level for the exam. The Chapter on Rotational and Circular Motion has various formulas that the students must memorize.

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

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

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MDCAT Physics Chapter 3 Work ,Energy & Power Online Test

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Question # 1

. 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.

Question # 2

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

Question # 3

The body at rest may have:

Question # 4

A bomb of mass 30 kg at rest explodes into two pieces of masses 18 kg and 12 kg. The velocity of 18 kg mass is 6 ms1 The KE of other mass is

Question # 5

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)

Question # 6

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:

Question # 7

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:

Question # 8

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

Question # 9

The gravity does no work, when the body moves:

Question # 10

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

Question # 11

Which of the following is a unit of energy?

Question # 12

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

Question # 13

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?

Question # 14

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

Question # 15

Two bodies moving towards each other collide and move away in opposite directions. There is some rise in temperature of bodies because a part of the kinetic energy is converted into

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

If the momentum of a body is increased n times, its kinetic energy increases:

Question # 20

A ball is thrown vertically upwards. Neglecting air resistance, which statement is correct?

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Besides cramming, the students should use logic to solve the questions of Physics. The candidates make sure to allocate the proper time to all the topics in this chapter. The practice helps the students to get good scores and strengthen their preparation before the commencement of the MDCAT exam. To get more information about the preparation of MDCAT, stay in touch with us and get a hand on the preparation material.

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MCAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1
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
A. the path taken by the suitcase
B. weight of the suitcase
C. initial and final position
D. None
2 Which of the following is a unit of energy?
A. unit
B. whatt
C. Horse Power
D. None of the above
3 . 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
4 If the velocity of a body becomes half, the kinetic energy of body will become
A. One fourth
B. Double
C. Four times
D. Half
5 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. 20
B. 200
C. 2
D. 10
6
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. 1.2kW
B. 120kW
C. 12kW
D. 1200kW
7
A bomb of mass 30 kg at rest explodes into two pieces of masses 18 kg and 12 kg. The velocity of 18 kg mass is 6 ms1 The KE of other mass is
A. 324 J
B. 256 J
C. 245 J
D. 524 J
8
A stone is thrown up from the surface of earth when it reaches at maximum height. its total energy is equal to
A. mgh
B. 1/2 𝑚𝑣2
C. zero
D. 2mgh
9 Work done in raising a box depends on:
A. How fast it is raised
B. The strength of the man
C. The height by which it is raised
D. None of the above
10 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%

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