- #1
jrbillbrian
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Homework Statement
Pete serves a tennis ball of mass 54 grams at a speed of 53.6 meters per second. The ball is in contact with Pete's racket through a distance of 49.7 centimeters. What force does Pete apply to the ball?
54 grams = 0.054 kg
Speed = 53.6 m/s
49.7 cm = 0.0497 m
Homework Equations
Force = mass x acceleration
Vfinal = at + vi
The Attempt at a Solution
I am VERY lost, considering the fact that our teacher told us to try and figure it any way we could.
I tried this. 0.0497 m = 0.5(53.6 m/s) * t2
t = 0.0420183500 s
Then I thought of the statement
It takes 0.0420183500 seconds to travel 0.0497 m when traveling at 53.6 m/s
Then I tried Vfinal = a*t + Vinitial
56.3 m/s = a * 0.0420183500 s
a = 1339.890784 m/s2
Force = 0.054 kg * 1339.890784 m/s/s
Force = 72.4 N
Can anyone help me out with this please?