Select the false statement

Important Questions on Work, Energy and Power

MEDIUM

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IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 51

A bullet of mass $m$ moving with a velocity $u$ strikes a block of mass $M$ at rest and gets embedded in the block. The loss of kinetic energy in the impact is

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IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 52

A bullet of mass $m$ moving with velocity $v$ strikes a suspended wooden block of mass $M.$ If the block rises to height $h,$ the initial velocity of the bullet will be

EASY

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 53

A ball is allowed to fall from a height of $10 \mathrm{m}.$ If there is $40 \%$ loss of energy due to impact, then after one impact ball will go up to

MEDIUM

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IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 54

A bullet weighing $10 \mathrm{g}$ and moving with a velocity $300 \mathrm{m} {\mathrm{s}}^{-1}$ strikes a $5 \mathrm{kg}$ block of ice and drop dead. The ice block is kept on smooth surface. The speed of the block after the collision is

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IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 55

A particle of mass $m$ moving eastward with a speed $v$ collides with another particle of the same mass moving northwards with same speed $v.$ The two particles coalesce on collision. The new particle of mass $2 m$ will move with velocity

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Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 56

Two perfectly elastic particles $A$ and $B$ of equal masses travelling along the line joining them with velocity $15 \mathrm{m} {\mathrm{s}}^{-1}$ and $10 \mathrm{m} {\mathrm{s}}^{-1}$ respectively, collide. Their velocities after the elastic collision will be (in $\mathrm{m} {\mathrm{s}}^{-1}$ ), respectively

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

If the magnitude of two vectors are 8 unit and 5 unit and their scalar product is zero, the angle between the two vectors is

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IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 6 - Work, Energy and Power>Assignment>Q 2

In which of the following figures the work done by force $F$ in displacing an object through distance $d$ is positive? ( $(\mathrm{\theta }$ is the angle between $F$ and $d)$