What factors effect the bounce of a ball?
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Transcript What factors effect the bounce of a ball?
BY: Jorge Quesada
Research
Elasticity
Friction
Air
Resistance
Hypothesis
If I drop a ball from a high point then, it well bounce
higher than if dropped from a lower height.
Independent and Dependent
Variable
Independent Variable
The height
The type of ball
Dependent Variable
Speed at witch the ball falls
Controlled Variable (3)
The Type of ball
Friction
Rate of fall
Materials and Procedures
Materials
Foam balls
Timer (phone)
Ladder
Pen and Paper
Procedure
Position a ladder at the site of the experiment.
Drop a ball three times (one at a time) from a height of 5ft,
record rate of fall.
Drop a ball three times (one at a time) from a height of 8ft,
record rate of fall.
compare results
Data
0.635
0.63
0.625
0.62
0.615
Average Rate of Fall
0.61
*
0.605
0
0.6
0.595
0.59
0.585
5ft Fall
8ft Fall
Conclusion
It turn out that my hypothesis was indeed correct, that
the higher the ball fell the more time it took for it to
land.
Experiment 2
Does wind affect the time it takes a ball to land on the
ground?
Hypothesis
If my research is correct, I think that wind will affect the
landing time of a ball.
Independent and dependent
variable
Independent variable
Speed of wind (high, low, medium)
The ball
Dependent variable
Speed the ball falls
Controlled variables
Air friction
Rate of fall
Type of ball
Materials and procedures
Materials
Ball
fan
Procedures
Place a fan in the mid point of the ball’s falling distance.
Drop ball from 6 ft on low(fan speeds), then medium , and
high. Repeat 3 times.
Record time of fall and average.
Data
average
6.2
6
5.8
5.6
5.4
average
5.2
5
4.8
4.6
4.4
Low
medium
high
conclusion
It turns out that the speed of the fan did affect the time
it took the ball to hit the ground.
Experiment 3
Does height affect the elasticity of a ball?
Hypothesis
I think it does have a effect on the ball elasticity in the
height the ball is dropped
Independent and dependent
variable
Independent variable
Foam ball
The height the ball is dropped from
Dependent variable
The height the ball jumps back up in inches
Controlled variable
Type of ball
Elasticity
The height the ball is dropped
Materials and procedures
Materials
Foam ball
Measuring tape
Procedures
One person stands in place
Ball is dropped from 3, 4 and 5 feet high
Record bounce distance of the ball in inches
Data
average in inches
35
30
25
20
average in inches
15
10
5
0
3ft drop
4ft drop
5ft drop
Conclusion
The elasticity of the ball was affect to the height the ball
was dropped.