Question

Two bodies having the same mass 5kg each have different surface areas 20m^2 and 10m^2 in contact with a horizontal plane. If the coefficient of friction is 0.4, the forces of friction that come into play when they are in motion will be in the ratio ​

Answer 1

$\huge \rm \purple{answer}$

Explanation:

Normal reaction exerted by plane on each body=N=mg=5g

Friction force exerted by plane on each body=uN=0.4(5g)...(1)

From 1 we can see that friction force does not depend on surface area

Therefore ratio of friction on each body=1