Work, Energy and Power-Power (NEET Physics): Questions 1 - 3 of 4

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Question number: 1

» Work, Energy and Power » Power

Assertion-Reason▾

Assertion (Ꭺ)

As shown in the figure, a uniform sphere is rolling on a horizontal surface without slipping, under the action of a horizontal force F.

Power developed due to friction force is zero.

Sphere with power developed due to friction is explained

Sphere With Power Developed Due to Friction Is Explained

In this figure we show that uniform sphere under the force F.

Reason (Ꭱ)

Power developed by gravity force is nonzero.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 2

» Work, Energy and Power » Power

MCQ▾

Question

A bus of mass 2000 kg has an engine which produces a constant power of 50 kW. If the resistance to motion, assumed constant is 2000 N. The maximum speed at which the bus can travel on level road and the acceleration when it is travelling at 15 m/s, will respectively be –

Choices

Choice (4) Response

a.

10 m/s, 5m/s 2

b.

25 m/s, 0.6666 m/s 2

c.

1.0 m/s, 50 m/s 2

d.

50 m/s, 1.0 m/s 2

Question number: 3

» Work, Energy and Power » Power

MCQ▾

Question

A bus of mass 1000 kg has an engine which produces a constant power of 50 kW. If the resistance to motion, assumed constant is 1000 N. The maximum speed at which the bus can travel on level road and the acceleration when it is travelling at 25 m/s, will respectively be –

Choices

Choice (4) Response

a.

1.0 m/s, 50 m/s 2

b.

5.0 m/s, 10 m/s 2

c.

50 m/s, 1.0 m/s 2

d.

10 m/s, 5m/s 2

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