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 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 # 2

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

Question # 3

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

Question # 4

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 # 5

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:

Question # 6

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 # 7

Work done in raising a box depends on:

Question # 8

If the K.E. of a body is increased by 300%, its momentum will increase by:

Question # 9

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

Question # 10

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 # 11

The gravity does no work, when the body moves:

Question # 12

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

Question # 13

Which of the following work is greater?

Question # 14

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 # 15

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 # 16

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

Question # 17

Ratio of dimension of K.E and power is:

Question # 18

Which of the following is a unit of energy?

Question # 19

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

Question # 20

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

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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 A ball is thrown vertically upwards. Neglecting air resistance, which statement is correct?
A. The kinetic energy of the ball is greatest at the greatest height attained
B. The potential energy of the ball increase uniformly with time during the ascent
C. By the principle of conservation of momentum. The momentum of the ball is constant throughout its motion
D. By the principle of conservation of energy, the total energy of the ball is constant throughout its motion
2 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
A. 5 J
B. 350 J
C. 100 J
D. 3430 J
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 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
5
Car X is traveling at half the speed of car Y. Car X has twice mass of car Y.
Which statement is correct?
A. Car X has half the kinetic energy of car Y
B. Car X has one quarter of the kinetic energy of car Y
C. Car X has twice the kinetic energy of car Y
D. The tow cars have the same kinetic energy
6 . 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
7 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
8 In a gravitational field when work done by gravity is negative then
A. P.E increases
B. P.E decrease
C. None
D. P.E remains same
9 If the K.E. of a body is increased by 300%, its momentum will increase by:
A. 100 %
B. 150 %
C. √300%
D. 175 %
10 The body at rest may have:
A. Energy
B. Momentum
C. Speed
D. Velocity

Test Questions

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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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