What factors influence amount of friction in sport?
nature of footwear and the surfaces , reaction forces - e.g weight
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10
How is the CoR use controlled in sport - give an example
New tennis / table tennis balls in matches; table tennis balls / basketball checked and must bounce to a certain height; golf club / baseball bats limit CoR
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10
give a legal example of CoR use in sport
squash ball warm up - ball travels faster when it is warm
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10
How can power output be optimised
Technique and sports equipment design
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10
What is dynamic/kinetic friction?
the frictional force between surfaces that are moving relative to each other
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10
What is power?
the rate at which work is performed - P = W/T or P = Fv
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monster
Reset all scores!
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gold
Win 50 points!
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shark
Other team loses 20 points!
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thief
Give points!
5
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20
25
seesaw
Swap points!
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gift
Win 20 points!
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gift
Win 15 points!
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banana
Go to last place!
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10
What does the coefficient of friction mean?
nature of the 2 surfaces in contact with each other - how slippy or rough they are
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10
what does static friction relate to?
refers to the force acting between two surfaces that are not moving relative to each other
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thief
Give points!
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15
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25
shark
Other team loses 25 points!
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shark
Other team loses 10 points!
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baam
Lose 10 points!
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10
Give an illegal use of CoR in sport
Freezing of baseballs / bats CoR is limited
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lifesaver
Give 15 points!
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fairy
Take points!
5
10
15
20
25
gift
Win 20 points!
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banana
Go to last place!
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10
what factors influence the coefficient of restitution?
