Work, Energy and Power (AIIMS Physics): Questions 20 - 24 of 25

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Question number: 20

» Work, Energy and Power » Work-Energy Theorem

MCQ▾

Question

A bullet when fired at a target with a velocity of 150ms1 , penetrates 4.5 meter into it. If the bullet is fired with the same velocity at a similar target with a thickness 0.5 meter, then it will emerge from it with a velocity of –

Choices

Choice (4) Response

a.

1002ms

b.

1002ms

c.

100ms

d.

All of the above

Question number: 21

» Work, Energy and Power » Work-Energy Theorem

MCQ▾

Question

Ratio of mass of proton and mass of electron is nearly about 1840. Now, if proton is accelerated by a potential difference of 2 KV, its kinetic energy is –

Choices

Choice (4) Response

a.

2KeV

b.

920eV

c.

1840eV

d.

460KeV

Question number: 22

» Work, Energy and Power » Work-Energy Theorem

MCQ▾

Question

A body rests on a horizontal rough surface. The coefficient of friction between the body and the surface is μ=0.4 . The body is given a velocity of 30ms . What is the distance covered by the body before coming to rest?

Choices

Choice (4) Response

a.

112.5 m

b.

100 m

c.

120.6 m

d.

132.5 m

Question number: 23

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

A body of mass 10 kg has momentum of 15kgms . When a force of 0.4 N is applied on it for 15 seconds, what is the change in its kinetic energy –

Choices

Choice (4) Response

a.

10.8 J

b.

5.0 J

c.

8.2 J

d.

15.2 J

Question number: 24

» Work, Energy and Power » Work-Energy Theorem

MCQ▾

Question

The spring constant of a spring balance is 5×103Nm . It is initially stretched by 5 cm from the unstretched position. Then the work done to stretch it further by another 10 cm is

Choices

Choice (4) Response

a.

30J

b.

40J

c.

90J

d.

60J

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