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Tennis racquet string tension and ball speed Featured science projectScience project video

Observation

The results show that all the 5 tennis players were able to hit and make the ball travel faster when using the racquet with the 50 lbs string tension.
 

Racquet string tension Highest speed of the ball measured using radar gun (km / hour)
  Player 1 Player 2 Player 3 Player 4 Player 5
50lbs 103 87 98 106 91
70lbs 98 81 94 102 85

The graph below represents the results of our science experiment.
 

tennis racquet tension science project

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Complexity level:
8
Project cost ($):
120
Time required:
1 hour to prepare, 6 hours for this science project experiment
Material availability:
You will need a radar gun. Their prices vary tremendously (some cost a few hundred dollars), but a fairly cheap and effective model is the Bushnell Speedster II - it should cost less than $100
Safety concerns:

Basic safety requirements