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

00:00
Question # 1

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 # 2

If the stone is thrown up vertically and return to ground, its potential energy is maximum

Question # 3

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 # 4

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

Question # 5

The gravity does no work, when the body moves:

Question # 6

When the velocity of a body is doubled:

Question # 7

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

Question # 8

Which of the following work is greater?

Question # 9

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 # 10

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

Question # 11

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 # 12

. 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 # 13

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 # 14

Ratio of dimension of K.E and power is:

Question # 15

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 # 16

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 # 17

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

Question # 18

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

Question # 19

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:

Question # 20

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

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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 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
2 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
A. heat energy
B. electrical energy
C. nuclear energy
D. mechanical energy
3 Which of the following work is greater?
A. + 100J
B. 0 J
C. - 100J
D. Both A and B are equal
4
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:
A. 3 × 104 J
B. 6 × 104J
C. 9 × 104J
D.
12× 104 J
5 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
6 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
7 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
8 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
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 When the velocity of a body is doubled:
A. Its K.E is doubled
B. Its P.E is doubled
C. Its momentum is doubled
D. Its acceleration is doubled

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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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