Projectile Motion Flashcards
What are the two natural forces that affect a projectile?
Air resistance - air resistance affects aerodynamic characteristics of a projectile
Gravity - downwards force brings projectile back to ground (what comes up must come down)
Different trajectories and examples in volleyball
High - large vertical motion - small horizontal motion - set
Low - small vertical motion - small horizontal motion - spike
Parabolic - average vertical motion - large horizontal motion - serve
List the factors affecting path of a projectile
Angle of release Height of release Speed of release Gravity Air resistance Spin
How does angle of release affect path of projectile?
Determines the trajectories shape
Determines time the object stays in the air Determines horizontal distance object moves
-optimal angle of release is 45 degrees
Angle of release > 45
- vertical velocity greater than horizontal
- large height and flight time
- small horizontal distance
Angle of release = 45
- = vertical and horizontal velocity
- max. horizontal distance
Angle of release
How does height of release affect path of a projectile?
Greater the height of release of projectile, greater the horizontal distance will cover
- projectile release from same level as land
- time to reach peak=time takes to land
- eg. Kicking soccer ball from ground - projectile release from lower level of landing
- time to reach peak is greater than time to land
- eg. Throwing - projectile release from higher level of landing
- time to reach peak is smaller than time to land
- eg. Hitting golf ball onto elevated green
How does speed of release affect path of a projectile?
Greater the speed of release, greater the distance the projectile will carry
-important factor is maximising distance
Velocity of a projectile at instant release determines height and length of trajectory
- vertical velocity component determines height of object
- horizontal component is constant throughout flight of projectile if air resistance=0 and is determined at point of release
How does gravity affect the path of a projectile?
Downwards force brings projectile back to ground (what comes up must come down)
Constant force at 9.8m/s
How does air resistance affect the path of a projectile?
Head wind- less distance covered
No wind- normal distance covered
Tail wind- more distance covered
How does Appin affect the path of a projectile?
Top spin- less distance covered
No spin- normal distance covered
Back spin- more distance covered
What is projectile motion?
What is trajectory?
An object (projectile) that's propelled into air or water that moves along a curved path Path of a projectile is the trajectory
