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A man of mass m=2kg is standing on a pla...

A man of mass `m=2kg` is standing on a platform of mass `M=5kg`, then at any instant.

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As shown in the figure, M is a man of mass 60 kg standing on a block of mass 40 kg kept on ground. The co-efficient of friction between the feet of the man and the block is 0.3 and that between B and the ground is 0.1. If the man accelerates with an acceleration 2(m)/(s^2) in the forward direction, then,

Knowledge Check

  • A man of mass 60 kg is standing on a boat of mass 140 kg, which is at rest in still water. The man is initially at 20 m from the shore. He starts walking on the boat for 4 s with constant speed 1.5 m/s towards the shore. The final distance of the man from the shore is

    A
    15.8 m
    B
    4.2 m
    C
    12.6 m
    D
    14.1 m

  • As shown in the figure, M is a man of mass 60 kg standing on a block of mass 40 kg kept on ground. The co-efficient of friction between the feet of the man and the block is 0.3 and that between B and the ground is 0.1. If the man accelerates with an acceleration 2(m)/(s^2) in the forward direction, then,

    A
    it is not possible
    B
    B will move backwards with an acceleration `0.5(m)/(s^2)`
    C
    B will not move
    D
    B will move forward with an acceleration `0.5(m)/(s^2)`.