Your forehead can withstand a force of about 6.0 kN before fracturing, while your cheekbone can withstand only about 1.3 kN. Suppose a 140 g baseball traveling at 30 m/s strikes your head and stops in 1.5 ms.
(a) What is the magnitude of the force that stops the baseball?
(b) What force does the baseball exert on your head? Explain.
(c) Are you in danger of a fracture if the ball hits you in the forehead? On the cheek?