projectile motion Flashcards

1
Q

how does top spin effect a ball in flight?

A

Top spin causes ball to dip/ comes down more quickly/ shorter flight path

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2
Q

how does back spin effect a ball in flight?

A

Back spin causes ball to float/ travel further/ longer flight path

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3
Q

how does side spin effect a ball in flight?

A

Side spin causes ball to swerve/ bend/ deviate to left or right/ hook/ slice

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4
Q

what’s the optimum angle of release when you want to reach a height the same as release height?

A

45 degrees

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5
Q

what happens to the flight path if the resultant force is closer to the air resistance force?

A

the flight path isn’t parabolic/ symmetrical
shortened flight path

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6
Q

what happens to the flight path if the resultant force is closer to the weight force?

A

the flight path is parabolic/ symmetrical

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7
Q

explain why the flight path of a shot put is symmetrical

A

-the resultant force is closer to the weight force
-so weight force is dominant
-so flight path is symmetrical

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8
Q

what is the Bernoulli principle?

A

the theory that higher velocity air flow creates lower pressure resulting in a subsequent lift force

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9
Q

what is a lift force?

A

an additional force created by pressure differences on opposing surfaces which can increase flight time and horizontal distance of a projectile

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10
Q

what is an aerofoil?

A

a shape with a curved upper surface and flat underneath surface
creates a lift force

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11
Q

whats the Magnus effect?

A

the change in air velocity/ pressure that occurs on different surfaces on an object as a result of it spinning which causes the object to deviate from its flight path

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12
Q

how does top spin effect bounce of the ball?

A

accelerates out of the bounce at a flatter angle, goes lower

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13
Q

how does back spin effect bounce of the ball?

A

decelerates out of the bounce, goes higher

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14
Q

advantages of using topspin

A

harder for opponent to return the ball

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15
Q

disadvantages of topspin

A

gives you less recovery time as it gets their quicker
is predictable

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16
Q

advantages of using backspin

A

more recovery time
harder to predict
travels further in golf

17
Q

effect of hook on flight path

A

deviates left

18
Q

effect of slice on flight path

A

deviates right

19
Q

optimum angle of attack for a discus

A

17 degrees

20
Q

why’s down force good in f1

A

increases friction, prevents skidding