Answer Happy

a) (6 pts) Consider a pendulum swinging back and forth. With words and a diagram, use either force and acceleration OR energy to explain where the pendulum bob reaches its maximum velocity, and why. b) (6 pts) Using words and a diagram, distinguish between transverse and longitudinal waves.
3. Barbara is starting a game of tennis by tossing the ball in the air and hitting it at the top of its motion, when it stops for a moment. The tennis ball has a mass of 52 grams and leaves the racquet traveling at 85 miles per hour! Her racquet is in contact with the ball for 0.039 seconds. a) (2 points) What is the momentum of the ball when it leaves the racquet? b) (3 points) How much force must she apply to achieve this change in momentum? c) (3 points) If the racquet moves 0.74 meters while it is in contact with the ball, how much work must she do to get the ball moving? d) (3 points) What is the kinetic energy of the ball after she strikes it? How does this compare to your answer from c)? e) (2 points) How much power is required to get the ball moving this fast?