Bouncing Ball Report
Aim
the aim of this project is to find out which surface will the balls bounces the highest.
Hypothesis
I considered the concrete surface as the most reliable source for making the ball bounce higher for each one.
Background
Depending on this experiment, air temperature can make a big difference for a ball to bounce on different surfaces, as air temperature can affect the gas molecules inside the ball, by either expanding or contracting the molecules, making the ball bounce either high or low.
Air pressure is another factor for making the ball bounce, as air pressure can contribute to the bounce height. If the air is thinner, there will be not much air resistance to the ball, making the ball bounce higher.
The last factor is the surfaces itself. Surfaces affect the bounce of the ball by receiving the kinetic energy of the ball. When the impact is received, some surfaces might reduce the bounce of the ball, like grass and other softer surfaces, by receiving the rebound energy of the ball, making the ball bounce lower.
Procedure
Variables:
Dependent - Measurement of the height (Centimetres).
Independent - The different types of surfaces (including cement, concrete, timber etc.) and different types of balls.
Controlled - Bouncing the ball at the same height when letting go of the ball. Considering the surfaces almost completely flat.
Equipment:
Measurement Tool (Ruler or Tape Measurement)
Surfaces (Timber, Linoleum, Carpet, Concrete, Grass)
Balls (Basketball, Tennis Ball, Soft Ball, Baseball, Rubber Ball)
Diagram of experiment

Method:
1. Get a ball
2. Let go of the ball at a fixed height of 1 meter
3. Measure the height the ball bounces for 5 different types of surfaces. Repeat 4 times.
4. Repeat this method for different type of balls.
Surfaces
Linoleum
Balls
1st
2nd
3rd
4th
Basketball
70
69
71
80
Tennis Ball
46
49
49
50
Soft Ball
43
42
42
42
Base Ball
33
32
35
32
Rubber Ball
72
71
73
72

Carpet
Balls
1st
2nd
3rd
4th
Basketball
50
49
51
50
Tennis Ball
34
35
36
38
Soft Ball
23
26
24
25
Base Ball
21
23
22
22
Rubber Ball
51
49
49
50

Timber
Balls
1st
2nd
3rd
4th
Basketball
81
84
86
86
Tennis Ball
45
47
46
48
Soft Ball
29
30
31
30
Base Ball
39
40
43
42
Rubber Ball
71
69
74
75

Concrete
Balls
1st
2nd
3rd
4th
Basketball
88
90
89
89
Tennis Ball
51
53
52
53
Soft Ball
43
42
41
42
Base Ball
29
31
30
33
Rubber Ball
82
77
76
77

Grass
Balls
1st
2nd
3rd
4th
Basketball
60
63
63
70
Tennis Ball
10
13
12
15
Soft Ball
12
10
10
9
Base Ball
4
6
5
7
Rubber Ball
18
17
18
19

Average Height (Centimetres)
Balls
Timber
Linoleum
Carpet
Concrete
Grass
Basketball
84.25
72.5
50
68.75
64
Tennis Ball
46
48.5
35.75
52.25
50
Soft Ball
30
42.25
24.5
42
10.25
Base Ball
41
33
22
30.75
5.5
Rubber Ball
72.25
72
49.75
78
72
Total (Average)
54.7
67.06
45.5
67.94
50.43

Discussion
The results showed that repetition of the same ball on different surfaces gives you more accurate results, helping me decide on which surface makes the ball bounce the highest.
There were a few problems throughout this experiment. For example, every time I drop a ball on different surfaces,