Serena's average serve is about 120 mph! Before you begin youwill need to convert that to meters per second. It takes the eyeabout 100 milliseconds to tell the brain it's looking at the ball.By the time the opposing player is ready to react, she only has 400milliseconds to do so.
1-According to the Sport Science Video on Serena's serve, howlong does it take for the eye to pick up the ball once she hits theserve? Write the time in milliseconds.
2-The opponent to Serena's serve doesn't pick up the ball untilit as at the net. How long do they have to react to the serve onceit is at this point? Write your answer in milliseconds.
3-Serena's serve is clocked on average at 120 mph. Calculate theimpulse (change in momentum) on the ball. Assuming its initialspeed is zero m/s and the final speed is 120 mph. Let's change thatto m/s. The mass of tennis ball is approximately 0.06 kg.
4-If Serena's racket is in contact with the ball for .005seconds, what is the average force she hits the ball during herserve? This calculation is in Newtons.
5-What is the acceleration of the tennis ball? In m/s^2
I'mfor the answers; please help me out! SOS!!
