Q1. Using the equation F=m v^2/r for a force an object in circular motion. Find the radius r of motion of a m=1.6 kg ball travelling in a circular path acted upon by a centripetal force F=7N.
Q2. A 91kg baseball player has a momentum of 710.6kg time's m/s. As he slides into second he experiences a frictional force of 590 Newton's. How much time must he give himself to slide if he is to stop while he reaches the base?