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 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 # 2

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 # 3

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?

Question # 4

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

Question # 5

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

Question # 6

Work done in raising a box depends on:

Question # 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

Question # 8

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:

Question # 9

When the velocity of a body is doubled:

Question # 10

The energy which an -e acquires when accelerated through a potential difference of 1 volt is called?

Question # 11

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:

Question # 12

An engine pumps up 100 kg of water through a height of 10m in 5s. Given that the efficiency of the engine is 60%, what is the power of the engine? (Take g = 10ms-2)

Question # 13

In a gravitational field when work done by gravity is negative then

Question # 14

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

Question # 15

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

Question # 16

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 # 17

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 # 18

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

Question # 19

Ratio of dimension of K.E and power is:

Question # 20

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:

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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 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
2 A light and a heavy body have equal momenta. Which one has greater K.E?
A. The light body
B. The heavy body
C. The K.E are equa
D. Data is incomplete
3 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
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 When a person lifts a body from ground work done by lifting force is?
A. Positive
B. Negative
C. Zero
D. Half of positive maximum
6 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?
A. 2 mgh
B. 3 mgh
C. 4mgh
D. 6mgh
7 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
8
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
9 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
10 Which of the following types of force can do no work on the particle on which it acts?
A. Frictional force
B. Gravitational force
C. Elastic force
D. Centripetal force

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