Exsc 440 Questions With Answers Study Guide Questions And Correct Answers

A 0.15 kg baseball collides with a 1.0 kg bat. The ball has a velocity of 40 m/s immediately before the collision. The center of mass of the bat also has a velocity of 40 m/s, but in the opposite direction, just before the collision. The coefficient of restitution between the bat and the ball is 0.50. Estimate how fast the baseball is moving as it leaves the bat following the collision. {Ans: }A hammer thrower, Brandon, spins with an angular velocity of 1200 degrees/s. The distance from his axis of rotation to the hammer head is 1.2m. a) What is the linear velocity of the hammer head? b) What is the centripetal acceleration of the hammer head? {Ans: }Joe, a pole-vaulter, is holding a vaulting pole parallel to the ground. The pole is 5 m long. Joe grips the pole with his right hand 10 cm from the top end of the pole and with his left hand 1 m from the top end of the pole. Although the pole is light (its mass is only 2.5 kg), the forces that Joe must exert on the pole to maintain it in this position are large. How large