projectile motion Flashcards
projectile motion
- refers to the movement of either an object or the human body as they travel through the air
- as soon as the ball is thrown, kicked or hit , it becomes projectile
- the human body acts as a projectile in sporting situations like a vault in gymnastics or a long jump
factors affecting the horizontal displacement of a projectile
- angle of release
- speed of release
- height of release
angle of release
factors affecting the horizontal displacement of a projectile
- to throw an object as far as possible
- the angle of realse from the performers hand is important
- the optimum angle of realse is dependant upon realse hight and landing height
release is equal to landing
factors affecting the horizontal displacement of a projectile - angle
- when the relase height is equal to the landing height
- the optimum angle of release is 45 degrees
- ingoring air resistance and gravity
- E.G long jump
realise is below landing
factors affecting the horizontal displacement of a projectile - angle
- the release height is below the landing height
- the optimum angle of realise is greater than 45 degree
- E.G the basketball shot (the ring is the landing height)
realse is greater than landing
factors affecting the horizontal displacement of a projectile - angle
- if the release height is greater than the landing height
- the optimum angle of realise needs to be less than 45 degress
- E.G shot put (relase height is higher than the point of landing (ground))
speed of release
factors affecting the horizontal displacement of a projectile
- the greater the release velocity of a projectile, the greater the horizontal displacement travelled
- E.G in the shot put, the speef of the shift or rotation across the circle ensures that the shot leaves the hand at maximum velocity - achieving the greatest orizontal displacement
height of release
factors affecting the horizontal displacement of a projectile
- the greater release height also results in an increase horizontal displacement
- gravity is always acting on the mass of a shotput, which therofroe means that a shot putter should aim to realise at the height point
- if the height release is lower the athelte will have to manipulate both their angle and velocity of release
factors affecting flight paths of different projectiles
factors affecting flight paths of different projectiles
- weight
- air resistance
- true parabola (shot put)
- disorted parabla (badminton)
shot put (true parabola)
factors affecting flight paths of different projectiles
- projectiles with a large weight force will have small air restistance forces and will follow a true parabolic flight path
- as the shot put has a large mass , there will be a longer weight arrow than air resistance
badminton
factors affecting flight paths of different projectiles
- longer the flight path , the longer the air resistance
- projectiles with a lighter mass, the effects of air restiance will cause a true parabola to become a disroted one
- a shuttle has a lighter mass and an unusal shape that increase air resistance
- slows down and the effect of air resitance reduces
vector components of parabolic flight (shot put)
factors affecting flight paths of different projectiles
look at diagram
- a shot put follows a parabolic flight path and it is realsed at an angle to the horizontal, its initial velocity has a horizontal component and a vertical component
- a vertical component can only be affected by gravity which is why the vertical component decreases during flight
- air resistance is negligible so both horizontal and vertical components are unaffected by air restiance
- this means the horizontal component remains constant throughout flight
- also possible to add the horizontal and vertical vectors together to get a resultant vector
