Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 12

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The figure below shows a fixed smooth incline plane having slope length $I,$ height $h$ and base length $b .$ It is attached to a smooth horizontal ground. A block of mass $m$ is released from top of a plane. On reaching the bottom of incline plane, the kinetic energy possessed by it is

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Important Questions on Work, Energy and Power

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 13

If symbols have their usual meanings, then which of the following relations is true for equilibrium of a particle?

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 14

The power required by engine of car of mass

1000 kg

to accelerate it from rest to a speed of

72 km h^{- 1}

in

20 s

is

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 15

A bullet of mass

100 g

hits a block of thickness

5 cm

with a speed of

200 m s^{- 1} .

It emerges with

10 %

of its initial kinetic energy. Then, its emergent speed will be

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 16

A stone of mass

2 kg

tie with the help of thread of length

2 m

and moves in vertical circle of radius

2 m

and moves in vertical circular motion. The difference between tension in the thread at lowest point and at the highest point is (Take

g = 10 m s^{2})

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 17

A body is released from position

A

as shown in figure. The speed of body at position

B

is

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 18

A chain of mass

2 kg

is placed on a smooth table with

\frac{1}{4}

th of its length hanging over the edge. If the length of chain is

4 m

then the work done in pulling the hanging portion of the chain back to the surface of the table is

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 19

If momentum of a body is decreased by

50 %,

then kinetic energy will be decreased by

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 20

Internal force cannot change