In the sports materials module, the design and materials of sports balls are studies. The factors that affect how a ball rebound are also explored. The design project is the make a baseball form new and innovative materials however; it should have similar specifications to the original official league baseball. The project is dome by group Newton from Al-Shaymaa Secondary school for Girls.

1. AL-BAIRAQ
SCIENCE IN SPORTS
DESIGNING A BASEBALL
NEWTON GROUP
SHAIKHAAL-KUWARI HAYA SULTAN
MARYAM AL-RUMAIHI JAWAHIR AL-MALKI

2. • Introduction
• Activity 1: Exploring Sports Balls Design
And Material.
• Activity 2: Measuring The Rebound Of Sports
Balls.
• Activity 3: Investigating Energy Absorption
Of Materials.
• Activity 4: Comparing Rolling Friction On
Different Surfaces.
• Design project: Making a Baseball
Outline

3. Introduction
• During Al-bairaq activities, we discovered many
types of materials in sport balls.
• We knew the purpose of each one. And depending
on it we have designed our own baseball ball, by
using some of these materials which will let our
ball a good creation.

4. Activity 1:
Exploring Sports Balls Design And
Material
• Objective(s):
• To learn about the difference between the materials and the
purpose of each one.

5. • Conclusion(s):
• Every piece of material has an important purpose.
Activity 1: Data Recording
Ball Material Purpose
Football Leather Protects the ball from
the outside
Rubber For a better rebound
Pressurized Air For a better rebound
Baseball Leather Protects the ball from
the outside
Cork Keeps the ball stronger
and lasts longer

6. Activity 2:
Measuring The Rebound Of Sports Balls
• Objective(s):
• To measure the drop and rebound height of the ball
(dropped from a specific height (1 m)).
• Calculate COR.

7. Activity 2: What is COR?
Coefficient Of Restitution, which is the amount of
the energy that the ball has remained after
collision.

8. Type of ball Drop height
(m)
Rebound
height (m)
COR Average
COR (m)
Tennis ball 1
0.45 √0.45/1
0.660.50 √0.50/1
0.40 √0.40/1
Baseball 1
0.35 √0.35/1
0.570.35 √0.35/1
0.30 √0.30/1
• Conclusion(s):
• Balls filled with pressurized air has higher rebound.
Activity 2: Data Recording

9. Activity 3:
Investigating Energy Absorption Of
Materials
• Objective(s):
• To drop the ball on different surfaces and compare its
rebound and COR.

10. Surface type Drop height
(m)
Rebound
height (m)
COR Average
COR
(m)
Deformation
of surfaces
Oak wood
surface
1
0.40 √0.40/1
0.652 No0.43 √0.43/1
0.45 √0.45/1
Particle
wood surface
1
0.45 √0.45/1
0.6523
No0.40 √0.40/1
0.43 √0.43/1
• Conclusion(s):
• Total amount of energy does not change.
• Hard surfaces absorb similar amount of
energy.
Activity 3: Data Recording
(using baseball ball)

11. Activity 4:
Comparing Rolling Friction On Different
Surfaces
• Objective(s):
• To roll the ball from a
specific height on three
different surfaces.
• To measure the distance
the ball will travel on
different surfaces and
observe the
effect of friction.

12. Description of
surfaces
Ramp height (cm) Distance ball
rolled
(cm)
Average distance
(cm)
Indoor and outdoor
carpet
4
54
5555
56
Styrofoam board 4
62
60.661
59
Artificial grass 4
39
39.338
41
• Conclusion(s):
• The friction of the surfaces affect on the distance which
the ball rolls to.
Activity 4: Data Recording

13. Designing A Baseball
• Objective(s):
• To design our own baseball from new materials
• To test the ball for rebound

14. Designing A Baseball
Balloons Cotton
Rubber
bands

15. • Conclusion(s):
• To have a successful product, we have to use and test
different materials.
Designing mini baseball game:
Data Recording
Trial(s) Distance (cm) Average distance
(cm)
Trial 1
60
61
Trial 2
61
Trial 3
62

16. • It was an amazing experience to be part of Al-bairaq, we
have leant a lot of things:
• We have learnt to be creative with our ideas, to be
independent, work hard like a united team and the most
important to be curious about everything around us and
how we can create things from nothing.
• Al-bairaq gave us the opportunity to challenge ourselves
no matter what the challenge is, because we have leant if
we want to achieve something we have to challenge
ourselves and work hard so we can succeed .
Conclusion

17. Many thanks to the partners UNESCO, Qatar National
Commission. And the gold sponsors RasGas and the
silver sponsor Shell. Without them this wouldn’t be
possible.
A huge thank you to our teachers, school and AL-Bairaq
team from Center for Advanced Materials (CAM), Qatar
University for supporting us during our journey with a
AL-Bairaq.
Acknowledgment