First slide

Friction on horizontal surface

Question

A block is placed at a distance of 2m from the rear on the floor of a truck (g=10ms^-2). When the truck moves with an acceleration of 8ms^-2, the block takes 2 sec to fall off from the rear of the truck. The coefficient of sliding friction between truck and the block is

Moderate

A

0.5
B

0.1
C

0.8
D

0.7

Solution

$s = ut + \frac{1}{2} {at}^{2}, a^{1} = μ_{k} g, a_{rel} = a - a^{1}$

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