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A block of mass 4 kg is placed on a roug...

A block of mass 4 kg is placed on a rough horizontal plane. A time dependent horizontal force F = kt acts on the block (k = 2 N/s). Find the frictional force between the block and the plane at t = 2 second and t = 5 second `(mu = 0.2)`

Text Solution

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When t=2sec F=4N
`f_(ms)=mu" mg"=0.2xx4xx10=8N`
`:. Fltf_(ms) :."friction"=4N`
When t=5sec F=2(5)=10N,
`Fgtf :." friction"=8N`
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