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

The gravity does no work, when the body moves:

Question # 2

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 # 3

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

Question # 4

Work done in raising a box depends on:

Question # 5

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

Question # 6

When the velocity of a body is doubled:

Question # 7

Which of the following is a unit of energy?

Question # 8

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 # 9

The energy stored in wound watch spring is

Question # 10

. 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 # 11

The body at rest may have:

Question # 12

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

Question # 13

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

Question # 14

A body of mass 3 Kg lies on the surface on the table 2m high. It is moved on the surface by 4m. The change of P.E will be:

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

Ratio of dimension of K.E and power is:

Question # 19

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

Question # 20

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

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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 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
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 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
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 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
6 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:
A. 300 N-m
B. 420 N-m
C. 720 N-m
D. none of these
7 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
8 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
9 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
10 In an explosion a body breaks up into two pieces of unequal masses. In this:
A. Both parts will have numerically equal momentum
B. Lighter part will have more momentum
C. Heavier part will have more momentum
D. Both parts will have equal kinetic energy

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