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

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

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

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

Question # 4

. 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 # 5

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

Question # 6

The body at rest may have:

Question # 7

Which of the following work is greater?

Question # 8

When the velocity of a body is doubled:

Question # 9

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

Question # 10

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

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

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

Question # 13

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 # 14

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

Question # 15

If the velocity of a body becomes half, the kinetic energy of body will become

Question # 16

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

Question # 17

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 # 18

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 # 19

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

Question # 20

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

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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 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
2
An elevator's motor produces 3000 W power. The speed With Which it can lift a 1000 kg load is:
A. 30.6ms-1
B. 0.306ms-1
C. 3.06ms-1
D. 300.3ms-1
3 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
4 The energy stored in wound watch spring is
A. K.E.
B. P.E.
C. heat energy
D. chemical energy
5 The body at rest may have:
A. Energy
B. Momentum
C. Speed
D. Velocity
6
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
7 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
8 In an explosion a body breaks up into two pieces of unequal masses. In this:
A. Both parts will have numerically equal momentum
B. Lighter part will have more momentum
C. Heavier part will have more momentum
D. Both parts will have equal kinetic energy
9 Which of the following work is greater?
A. + 100J
B. 0 J
C. - 100J
D. Both A and B are equal
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
A. 1
B. 4/3
C. 16/9
D. none of these

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