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

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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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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 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

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 21

Select correct statement regarding stable equilibrium.

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 1

A force $\vec{F} = (3 \vec{i} + 4 \vec{j}) N$ Acts on a particle moving in $x - y$ Plane. Starting from origin, the particle first goes along $x$ -axis to the point $(4, 0) m$ And then parallel to the $y$ -axis to the point $(4, 3) m .$ The total work done by the force on the particle is