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Standard XII

Physics

Energy in Collision

A solid ball ...

Question

A solid ball is falling in a liquid with terminal velocity $v$ . The power delivered by viscous force is proportional to

v^{2}

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v

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v^{3}

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v^{- 1}

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Solution

The correct option is B $v$
At state of dynamic equilibrium, acceleration is zero.
$⟹$ Net power $= 0$ ,
Power by viscous force = Power by $m g = m g \times v$

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A solid ball is falling in a liquid with terminal velocity v. The power delivered by viscous force is proportional to

The correct option is B vAt state of dynamic equilibrium, acceleration is zero. ⟹Net power=0, Power by viscous force = Power bymg=mg×v

A solid ball is falling in a liquid with terminal velocity $v$ . The power delivered by viscous force is proportional to

The correct option is B $v$
At state of dynamic equilibrium, acceleration is zero.
$⟹$ Net power $= 0$ ,
Power by viscous force = Power by $m g = m g \times v$