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Physics - W.E.P. Question with Solution | TestHub

PhysicsW.E.P.MiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A body of mass $10 kg$ is moving on a horizontal surface by applying a force of $10 N$ in the forward direction. The body moves with a constant velocity of $0.2 m s^{- 1}$ . Work done by the force of friction in the first $10$ seconds is

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Answer:

Solution:

Since, body moves with constant velocity. So, net force on the body is zero.

$Here, N = mg$

$F = f$

$∴ W = \vec{f} \cdot \vec{s} = fs cos 180 °$

$= - fs = -10 \times 2 = -20 J$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:W.E.P.Subtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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