projectile motion + levers Flashcards
projectile
an airborne body that is only affected by the forces of gravity and air resistance
trajectory
the flight path of an object/boy in flight
horizontal and vertical components
vertical
influenced by gravity, speed and angle of release
high jump, pole vault, basketball goal
horizontal
influenced by air and speed of release (max distance)
long jump, lawn bowls, archery
factors an athlete can adjust
- speed of release
- heigh of release
- angle of release
speed of release effect
the greater the force applied to the projectile, the greater the speed and the further it will travel, if all other forces are equal
speed of release
‘the speed at which an object is propelled or kicked into the air’
changing speed of release
- use force summation principles to generate more force
- applying more force makes it go further
height of release
the difference between the height that a projectile is released from and the height at which it lands
height of release effect
hardest to change
if the angle and speed are constant, an object released from a higher point will naturally travel further than one in a lower point
changing height of release
- jumping up when throwing
- raising your arms
- raising the ball up when you’re kicking
angle of release
the angle at which a body or object is projected into the air in relation to the horizontal
angle of release effect
- when max distance is desired, angle of release will be approx. 45°
- when trajectory is low, the angle of release will be below 45°
optimal angle of release
- > zero (target is lower than take off): <45° (eg. javelin, shot put)
- zero (target and take off are on the same level): 45° (eg. softball pitch, soccer kick)
- <zero (target is higher than take off) >45° (eg. high jump)
levers
a simple machine consisting of a rigid bar that can be made to rotate around an axis
