Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 10

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In a conservative field, the potential energy $U$ as a function of position $x$ is given by $U = x^{2}$ . Then the corresponding conservative force is given by

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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 11

If

\vec{A} = A_{x} \hat{i} + A_{y} \hat{j} + A_{z} \hat{k}

and

\vec{B} = B_{x} \hat{i} + B_{y} \hat{j} + B_{z} \hat{k}

then

\vec{A} \cdot \vec{B}

is given as

(A_{x} B_{y}

_____

A_{y} B_{y} + A_{z} B_{z})

.

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

The work done is positive when angle $\theta$ between force and displacement is _____.

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

The change _____ in energy of a particle is equal to the net work done on it.

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

Total mechanical energy of a system is conserved if the forces doing work on it are _____.

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

Coefficient of restitution

e = 1

for _____ collision.

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

Can kinetic energy of a system be increased without applying any external force?

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

Comment on the nature of work done by the stretching force on a spring.

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

What is the source of K.E. of the falling rain drops?