Physics – Projectiles Launched Horizontally
Formulas:
1) d = (1/2) (vf + vi)t
2) d = vit + (1/2)at2
3) d = vft – (1/2)at2
Date: _______________________
4) vf2 = vi2 + 2ad
5) a = (vf – vi)/t
I throw a ball off the edge of a 15.0m tall cliff. I threw it horizontally at 8.0m/s.
a) Determine how much time it takes to fall. – think vertically
b) Determine how far from the base of the cliff it hits the ground. – think horizontally
c) Determine how fast it is moving vertically when it hits the ground. – think vertically
d) Determine what its total velocity is when it hits the ground. – think about both motions
Example: An arrow is fired from a 150.0 m cliff with a velocity of 25 m/s.
a) How long will it take for the arrow to fall to the ground?
b) How far from the base of the cliff will it hit the ground?
c) How fast will the arrow be vertically moving when it hits the ground?
d) What will the arrow’s velocity be when it hits the ground?