MDCAT Physics Chapter 2 Work and energy Online Test

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  • Chapter NameWork ,Energy & Power
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MDCAT Physics Chapter 2 Work and energy Online Test

  • Total Questions20

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MDCAT Physics Chapter 2 Work and energy Online Test

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Question # 1

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 # 2

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?

Question # 3

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

Question # 4

Ratio of dimension of K.E and power is:

Question # 5

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 # 6

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

Question # 7

The gravity does no work, when the body moves:

Question # 8

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

Question # 9

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

Question # 10

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 # 11

A force 𝑭 = (πŸ“π’ŠΜ‚+ πŸ‘π–©Μ‚) newton is applied over a particle which displaces it from its origin to the point 𝒓 = (πŸπ’ŠΜ‚βˆ’ πŸπ–©Μ‚) meters. The work done on the particle is:

Question # 12

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

Question # 13

Which of the following work is greater?

Question # 14

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

Question # 15

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 # 16

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

Question # 17

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

Question # 18

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 # 19

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 # 20

Work done in raising a box depends on:

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