A car is accelerating with acceleration = 20 m/s2 . A box of mass 10 kg is placed inside the car
is in contact with the vertical wall as shown. The friction coefficient between the box and the
wall is m = 0.6 and take g = 10 m/s2
.
20m/s2
µ =0.6
(A) The acceleration of the box will be 20 m/s2
(B) The friction force acting on the box will be 100 N
(C) The contact force between the vertical wall and the box will be 100Ö5 N
(D) The net contact force between the vertical wall and the box is only of electromagnetic in
nature
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