Two blocks are attached by a thin inextensible string over a frictionless, massless pulley. there is a frictional force between the block on the incline and the incline. the acceleration of gravity is 9.8 m/s 2 . 13 kg 13 kg µ t 1.1 m/s 0 m/s 2 39◦ calculate the magnitude of the frictional force acting on the block on the incline. answer in units of n.