15.3.12
Hockey player, being at a distance of 10 m from the gate, with a stick informs the puck lying on the ice, the speed of 8 m / s. The puck, sliding over the surface of the ice, flies into the gate at a speed of 7.7 m / s. Determine the sliding friction coefficient between the washer and the ice surface. (Answer 2.40 • 10-2)