kittyclaw3544 kittyclaw3544 27-02-2024 Physics contestada A block of mass 20 kg is pushed with a horizontal force of 90 N. If the coefficient of static and kinetic friction are 0.4 and 0.3, the frictional force acting on the block is: a) 70 N b) 75 N c) 80 N d) 85 N