Bouncing balls

Bouncing Balls

Aim:
I want to find out if there is a relationship between how high a ball is dropped from and how high it bounces up.

Hypothesis:
I predict that the higher the ball is dropped from, the higher it bounces. 

and the surface texture may change the height of the bounce.
Method:
The equipment that I will need is:

• Bouncy ball
• Ruler
• Stand with boss head and clamp

1. Attach the clamp to the stand.
2. Clamp the ruler onto the stand so that the zero mark is on the ground.
3. Hold the bottom of the ball on 50cm and drop.
4. Record the height of the bounce measuring the bottom of the ball.
5. Repeat the experiment twice more and record the average measurement.
6. Repeat the whole experiment using heights of 60cm, 70cm, 80cm, 90cm, 100cm

                                      
Variables:

Independent (changing) Variable = The height of the drop
Dependent (measured) Variable = The height of the bounce

Results:

Concrete

Height of Drop	Height of Bounce
50cm	12cm
60cm
70cm
80cm
90cm	50-45-cm
100cm	60-50cm

dopping the ball on the carpet makes it bounce lower

and on concrete it bounce higher 

Why?

the carpet is soft and does not eject the tension like rubber and because carpet sinks and does not push the ball harder it will obviously not bounce high

concrete does not move because of the weight of the ball the ball is so light and when the ball drops the tension squeezes on the ball and the concrete does no absorb any tension and when the ball stops the tension releases and springs the ball higher.