Question

A block of mass 2kg rests on a horizontal surface.If a horizontal force of 5N is applied on a block the
frictional force on it is

Answer 1

if block is on rest it may be that there is only 5N force will work

Answer 2

Given :

Mass of block , m = 2 kg .

It its on rest if a horizontal force of 5 N is applied on a block .

To Find :

The frictional force applied on the block .

Solution :

Maximum value of static friction is given by :

$f_s=\mu_s (mg)\\\\f_s=0.5\times 2\times 10\\\\f_s=10\ N$

We know , if force applied is less than maximum value of static friction than the value friction force is equal to the force applied .

Therefore , frictional force applied on the block is 10 N .

Learn More :

Kinematics

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