Bounce efficiency test on various surfaces.

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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 either variable 3 times each so we can later work out an average height which will make the results more reliable . For accuracy we will do a sample test for each variable to see where about the ball will bounce to , this means we can catch the result easier with less room for space , we will take measurements to 1 decimal place . We will use cm for measurements. Whichever variable we choose neither will be 100% efficient as the ball will partially chance shape which will make it lose energy as in heat and sound loss (energy loss) as well. This means if the ball bounces to a height equal to or above the height we dropped it from it is definitely an anomalous result.

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   I predict when I change the surface the ball will bounce at:

          45% on lino

          10% on grass

          60% on wood

          65% on concrete

          7% on carpet

as the softer the material the more impact/kinetic energy will be lost.

If I changed the ball it would bounce at :

          70% with a tennis ball

          30% with a base ball

          ...

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