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Physics - NLM Question with Solution | TestHub

PhysicsNLMMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A $60 k g$ body is pushed with just enough force to start it moving across a floor and the same force continues to act afterwards. The coefficient of static friction and sliding friction are $0.5$ and $0.4$ respectively. The acceleration of the body is

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Answer:

Solution:

Force required to just start the motion is,

$f_{L} = μ_{s} m g$

Once body starts sliding friction becomes kinetic,

$∴$ $a = \frac{f_{L} - f_{k}}{m} = \frac{μ_{s} m g - μ_{k} m g}{m}$

$a = (μ_{s} - μ_{k}) g = (0.5 - 0.4) 10 m s^{- 2}$

$a = 1 m s^{- 2}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:NLMSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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