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Bounce efficiency test on various surfaces.

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Introduction

Bounce efficiency test on various surfaces.

Introduction.

This is an experiment to see how high a ball will bounce on the different surfaces. We will use 5 different surfaces – concrete , wood , grass , lino and carpet material.To do this we must use the same size ball to reduce excess drag and drop it from the same height each time . That is one variable (surface type) , the other is ball material – tennis ball , golf ball , bounce ball , cricket ball and baseball . We would drop it from the same height each time . We try bouncing the ball from

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Middle

If I changed the ball it would bounce at :

          70% with a tennis ball

          30% with a base ball

          20% with a golf ball

          35% with a cricket ball

          80% with a bounce ball

as a soft ball would spring back but lose lots of energy through sound , heat , and change of shape. I have chosen to use surfaces as my variable.

Method

We will by eye drop a ball from a definite height (from the same person each time) onto a different surface at least 3 times, we then observe how high it rebounds , take the results , then insert and compare them in a table.

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Conclusion

ed (cm)

Height bounced (cm)

Average (cm)

Efficiency (%)

Lino

Grass

Wood

Concrete

Carpet

To work out the efficiency percentage we divide height bounced by height dropped then multiply the answer by 100.

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