4 - Projectile Motion Flashcards
What is projectile motion?
The motion observed when bodies are projected into the air and are under the influence of gravity and air resistance
What are some sporting examples of projectile motion?
Discus, Long jump, Basketball, Dive
What is gravity?
The attraction influence that the earth has on bodies close to its surface
What is air resistance?
Opposes the motion of a projectile
What is trajectory?
Flight path of a projectile through the air
What are the three primary factors that influence projectile trajectory?
Projection angle
Projection velocity
Relative projection height
What does the projection angle dictate?
- the shape of the trajectory
- relative magnitude of the horizontal and vertical velocity components
Describe the horizontal and vertical components when the projection angle is between
0-45
=45
45-90
0-45, Horizontal is greater, Vertical is lesser
45, Horizontal is equal, Vertical is equal
45-90, Horizontal is lesser, Vertical is greater
What is projection velocity?
Determines the height and range of the projectile when all of the other factors are held constant
What are the general goals for projectile?
Maximise range (shot put) Maximise total distance (golf) Optimise range and flight time Maximise height (vertical jump) Optimise heigh and range (high jump) Minimise flight time (basketball throw) Accuracy (basketball shot)
What can projectile motion be considered in terms of?
Vertical and Horizontal components
What is projectile height?
The difference in height between release and landing
What is positive, negative and equal projection height?
Positive = release above landing Negative = landing above release Equal = landing and release are equal
What happens if the projection height is 0?
Parabolic flight path e.g table tennis
What happens when projection height > 0?
Time to apex is less than time to ground e.g shot put
