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

Ratio of dimension of K.E and power is:

Question # 2

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

Question # 3

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

Question # 4

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 # 5

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 # 6

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

Question # 7

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

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

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

Question # 10

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

Question # 11

A stone is thrown up from the surface of earth when it reaches at maximum height. its total energy is equal to

Question # 12

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

Question # 13

When the velocity of a body is doubled:

Question # 14

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 # 15

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

Question # 16

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 # 17

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?

Question # 18

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 # 19

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

Question # 20

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

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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 momentum of a body is increased n times, its kinetic energy increases:
A. n times
B. 2 n times
C. √𝑛 times
D. n 2 time
2 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
3 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
4 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:
A. Mass of the book and time taken
B. Weight of the book and height of the book-shelf
C. Height of the book-shelf and time taken
D. Mass of the book, height of the book-shelf and time taken
5
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
6 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
7 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
8 3 joules of work is done in 3 seconds, then power is:
A. 6 watt
B. 3 watt
C. 18 watt
D. 1 watt
9 A man pushes a wall and fails to displace it. He does:
A. Negative work
B. Positive but not maximum work
C. No work at all
D. Maximum work
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:
A. Zero
B. 2J
C. 60J
D. 600J

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  • Aleeza Ilyas

    Aleeza Ilyas

    05 Aug 2022

    Answer key is mostly wrong sir

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  • ADEEL

    ADEEL

    14 Apr 2019

    ..

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  • ahmer

    ahmer

    02 Nov 2018

    12

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  • Sanam khan

    Sanam khan

    12 May 2018

    Test Dana k bad ksa pata Chala GA k Mara konsa mcqs wrong ha 😛 I got 94 marks out of 100

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  • Sheza fiaz

    Sheza fiaz

    18 Apr 2018

    How can we become a member of ths website.??

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