Question

The fast server in women's tennis is Venus Williams, who recorded a serve of 130   (209) in 2007. If her racket pushed on the ball for a distance of 0.10, How much would be  the average acceleration of the ball during her serve?

Answer 1

Ball final speed = 209 km/hr = 58.12 m/s
Racket displacement = 0.1 meters
Using the equation of motion:
2as = v² - u²
Where the initial velocity u is 0
a = (58.12)²/2 * 0.1
a = 16,889.7 m/s²