A block of mass 20 kg is pushed with a horizontal force of 90N. If the coefficient of static and kinetic friction are 0.4 and 0.3, the frictional force acting on the block is (g = 10ms^(-2))

A block of mass 20 kg is pushed with a horizontal force of 90N. If the

1.	A block of mass 20 kg is pushed with a horizontal force of 90N. If the coefficient of static and kinetic friction are 0.4 and 0.3, the frictional force acting on the block is (g = 10ms^(-2))
Answer» 90N 80N 60N 30N Solution :`f_(K)=mu_(k)N, N=mg`