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

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 # 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

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 # 4

Ratio of dimension of K.E and power is:

Question # 5

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

Question # 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:

Question # 7

The energy stored in wound watch spring is

Question # 8

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 # 9

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 # 10

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

Question # 11

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

Question # 12

When the velocity of a body is doubled:

Question # 13

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 # 14

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

Question # 15

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

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

Question # 18

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

Question # 19

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

Question # 20

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

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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 K.E. of a body is increased by 300%, its momentum will increase by:
A. 100 %
B. 150 %
C. √300%
D. 175 %
2
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
3 A force of 6 N act horizontally on a stationary mass of 2kg for 4s. The kineticenergy in joule is
A. 12
B. 72
C. 56
D. 888
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:
A. Zero
B. 2J
C. 60J
D. 600J
5 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
6 Which of the following work is greater?
A. + 100J
B. 0 J
C. - 100J
D. Both A and B are equal
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 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
9 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
10 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

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