4.

() A baseball of mass 150 gr is initially traveling horizontally at 60 m/s. It is struck by a bat, after which the baseball is still travelling horizontally but in exactly the opposite direction from its initial motion at a speed of 50 m/s. Consider the collision of the bat and the ball. Assume that before the collision, the bat is moving in a hoizontal circle at an angular velocity of @ rad/s. Assume that the player holding the bat exerts no torque. The bat has a moment of inertia of 0.4 kg.m' about the pivot and the ball hits at a point that is 75 cm away from the pivot. After the collision the bat is still swinging in the same direction around the same pivot but with a reduced angular velocity of 0.40m. Find the numerical value of o. pivot 0.75 m 60 m/s 50 m/s Before After