Question

You are dragging a block on a surface with friction at a steady speed of 2 m/s and exert a force of 5 N to do so. What is the force of friction?

Answer 1

Answer:

Friction = 5 N

Explanation:

As we know that block is moving at constant speed

So the acceleration of the block is zero

So we will have

$F_{net} = 0$

for net force to be zero

Force exerted on the object by external system must be counter balanced by the force of friction

So we have

$F_{ex} = F_f$

so we have

$F_f = 5 N$