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Physics - NLM Question with Solution | TestHub

PhysicsNLMMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A block of mass $m$ is stationary with respect to a wedge of mass $M$ moving with uniform speed $v$ on a horizontal surface. Find the work done by friction force on the block in $t$ second.

Options:

Answer:

Solution:

As the block is at rest with respect to wedge,

$f_{r} = m g \sin θ$

Work done by friction

$W = F S \cos θ$

$W = - (m g \sin θ) (v t) \cos θ$

$W = - \frac{m g \sin 2 θ}{2} (v t)$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:NLMSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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