Question

A vehicle has 1000kg mass and co efficient of friction between tyres and road is 0.4 what is the maximum breaking force

Answer 1

since we know that
formula of friction
f = M . N
now coefficient of friction is .4 ( M )
and N = 1000 × 10
now put the values is this
so f = 1000 × 10 ×0.4 = 4000 N