Work, Energy and Power (AIIMS Physics): Questions 11 - 14 of 25

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Question number: 11

» Work, Energy and Power » Power

MCQ▾

Question

A body moves along the straight line by a machine delivering constant power. The ratio of distance at t=3 and t=5 moved by the body is –

Choices

Choice (4) Response

a.

27125

b.

27125

c.

19

d.

35

Question number: 12

» 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.

100ms

c.

1002ms

d.

100ms

Question number: 13

» Work, Energy and Power » Elastic and Inelastic Collisions

MCQ▾

Question

A wire suspended vertically from one end is stretched by attaching a weight of x to the lower end. The weight stretches the wire by 2 mm. If the elastic energy stored in the wire is 0.4 J, what is the value of x ?

Choices

Choice (4) Response

a.

400 N

b.

100 N

c.

600 N

d.

250 N

Question number: 14

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

A V – shape is created by joining two same sized roads. The angle between two rods is α . If this system is rotating about a line passing through their ends which are joined and perpendicular to their plane, then the work done (W) is –

Choices

Choice (4) Response

a.

W is independent of α .

b.

Maximum for α=900

c.

Maximum for α=300

d.

Maximum for α=00

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