fluid mechanics and projectile motion Flashcards

1
Q

what is fluid mechanics

A

the study of the forces acting on an object through air or water

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2
Q

what two factors are important to consider when playing sport

A

air resistance
drag

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3
Q

what is air resistance

A

is a force that opposes the motion of the boy traveling through air

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4
Q

what is drag

A

resistance in the water i referred to as drag, it will depend on the environment

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5
Q

what does air resistance and drag depend on

A

-the velocity of the moving body- increase in velocity results in greater resistance
-the front cross-sectional area of the moving body- the larger the cross-sectional area, the greater the air resistance
-shape and surface characteristics on the moving body- a streamline shape results in less resistance
-mass of an object- heavier objects will have less than an effect on air resistance, lighter objects will be affected more by air resistance

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6
Q

what is projectile motion

A

refers to the motion of either an object or the human body being ‘projected’ into the air at an angle by an external force

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7
Q

what are the three factors that will determine the horizontal distance that a projectile can travel

A

angle of release
speed of release
height of release

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8
Q

what is angle of release

A

the optimal angle of release is 45 degrees
it is dependant upon the release height and landing height

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9
Q

waht happens to the landing height and release height if optimal release angle is lower

A

is higher

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10
Q

what happens when speed of release is increased

A

greater the horizontal distance travelled

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11
Q

what happens if release height is greater than landing height

A

release is less than 45 degrees

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12
Q

what happens is release height is lower than the landing height

A

optimum angle of release is lower than 45 degrees

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13
Q

what happens to projectile in flight

A

describes as parabolic shape.
if weight is the dominant force the air resistance is less effective and a parabolic flight occurs
if air resistance is dominant over weight a non-parabolic light path will occur.

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14
Q

what is a parabolic flight path

A

a symmetrical flight path.

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15
Q

what sporting example is parabolic flight path

A

shot put
weight provides more of a resistance than air resistance, meaning air resistance doesn’t have an affect causing a parabolic flight path

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16
Q

what is a non-parabolic flight path

A

a non symmetrical path

17
Q

what is a sporting example of a non parabolic flight path

A

badminton shuttle, when a shuttle has been hit into the air, air resistance is the major form of resistance , due to the light mass of the shuttle and the high velocity of release

18
Q

how can projectile flight be illustrated

A

free body diagrams, this is a snapshot of the forces acting on the object at 3 phases of motion (start,middle and end)