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A block of mass 5kg is placed on a rough...

A block of mass 5kg is placed on a rough horizontal plane.A time dependent horizontal force `F=(t^(2)+2t)` N acts on the block. The friction force between the block and the plane at t=3s is (`mu=0.4`)

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Knowledge Check

  • A block of mass 4 kg is placed on a rough horizontal force plane. A time dependent horizontal force F = k t acts on the block. Here k = 2 Ns^(-1) . The frictional force between the block and plane at time t = 2 s is (mu = 0.2)

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    D
    `10 N`

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