First slide

Friction on horizontal surface

Question

On the horizontal surface of a truck a block of mass 1 kg is placed ( $μ$ = 0.6) and truck is moving with acceleration 5 m/s² , then the fictional force on block will be :

Easy

A

5 N
B

6N
C

5.88N
D

8 N

Solution

FBD of block w.r.t. truck

$\begin{array}{l} f_{max} = μmg = 0 .6 (10) = 6 N \\ ma = 1 (5) = 5 N \end{array}$

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