- #1
Jobeanie
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Homework Statement
Hi,
So the question asks me to find the launch velocity of a bullet that was shot up at a 90 degree angle. The bullet then came back down at the same height that it was shot at in 1.37 seconds.
I'm not sure if I'm using the right formula, or even plugging the right numbers in.
Homework Equations
The Attempt at a Solution
I used the formula dy= vy.t + ay.t /2
dy = 0
vy = launch velocity
t = 0.685 (because i divided it by 2 for the max?)
and a = -9.8 m/s/s
Or would I have to use the formula a=(vf - vi)/2 ? with vf = 0 ?
Sorry, I'm really confused.
Thanks! :)