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AL-BairaqScience in Sports 5th Cycle
BaseballAl-Shaymaa_Einstein
1-latifa Al-Dosari
2-Aldana Al-Mohammed
3 -Nouf Al-lbuainain
4-Alhanouf Al-Shammeri
Outline• Introduction• Activity 1: : Exploring Ball Design
and Materials • Activity 2:Measuring the Rebound of
Sports Ball• Activity 3:Investigating Energy
Absorption of Materials • Activity 4: Comparing Rolling
Friction on Different Surfaces • Product Idea: Making a Baseball
IntroductionThere are too many sports and different materiel to make the sports equipment. Each material serve a purpose.In AL-Bairaq workshop different sports materials were studied to design our own baseball
Activity 1: Exploring Ball design and Materials Objective
To show that sports equipment are designed to meet the requirements of a specific sport and that the materials used in the equipment's construction help it meet those requirements
Procedure A softball was cut in half and the layering
of the materials was examined
Results Data
ConclusionWe discovered that different materials are
needed to create a softball
Ball Materials made of
Reason
Softball Cowhide Durability with withstand frequent hits
cork Centralized weight
Activity 2:Measuring the Rebound of Sports Ball Objectives:
To understand that the materials in a ball affects how high it bounces
Procedure:Two balls were dropped from 1
meter height on the same surface to measure the rebound height and compare. Also the COR was calculated
Coefficient of Restitution COR Is a ratio that indicates how high the ball will
bounce back after a drop. It is a ratio between 0 and 1
The higher the COR the higher that ball will bounce back
Results
Conclusion الخل
Conclusion:Racket ball has higher COR which is expected for this kind of balls indicated by it high rebound
Type of ball
Drop height (cm)
Rebound height(cm)
COR Average COR
Racket ball 100 30 0.53 0.5430 0.5331 0.55
Golf ball 100 15 0.39 0.3815 0.3914 0.37
Activity 3:Investigating Energy Absorption of Materials Objectives:
To observe that surface may absorb energy by temporarily or permanently deforming of changing shape
Procedure:One golf balls was dropped on
two different surface to observe the effect of surface on the rebound of the ball
Data Recording Deformation of Surface
Average COR
COR Rebound height (cm)
Drop Height (cm)
Surface Type
Yes 0.67 0.67 45 100 Oak0.67 450.66 44
No 0.71 0.70 50 100 Poplar0.70 500.71 51
Conclusion:Oak wood appears to have higher absorption of energy of energy since the surface was a little deformed compared to poplar wood. Also, its observed that the rebound on poplar wood is higher
Activity 4: Comparing Rolling Friction on Different Surfaces Objectives:
Distinguish between the friction of two surfaces and compare the rolling ability of a racket ball
Procedure:A racket ball was pushed down two
surfaces and the distance crossed was measured to observe the effect of friction
Data RecordingAverage distance cm
Distance ball rolled cm
Ramp height cm
Description of surface
43 46 4 Synthetic grass4043
95.3 95 4 Foam9496
Conclusion Friction affects the rolling ability of balls since
some of its energy is lost Grass causes more friction that foam since it’s
a rougher surface The distance crossed on the foam surface is
more than the distance crosses on artificial grass
Product Idea: Making a Baseball
Baseball is a bat-and game played between two teams of nine players each who take turns batting and fielding
ObjectivesTo design a new baseball from creative materials that has similar specifications to the original ball
Trail 1: Failed Materials made of: 1. Rubber band2. Tissues and paper3. Tennis ball 4. Glue Testing:1. Rebound
2. Diameter 7.1 cm3. Weight 130 g
Rebound1
Rebound 2
Rebound 3
Average
55 54 54 54.3
Trail 2: Successful Materials made of: 1. Rubber band2. Tissues and paper3. Glue4. Wool5. Cotton6. Rubber ball “small” Testing:1. Rebound
2. Diameter 7.4 cm3. Weight 149 g
Rebound1
Rebound 2
Rebound 3
Average
61 63 62
AcknowledgmentI would like to thank my teammates who worked hard in this project, Qatar University and Eng. Ruba. Also, I would like to thank the sponsors UNESCO, Qatar National Commission, Ras Gas and Shell.