i understand that y=0 and vy=-v0y...
what i don't understand is how you can use v = v0 + at to find the time, since you still don't know what v0 (or v) is.
Homework Statement
A long jumper leaves the ground at 45 degrees above the horizontal and lands 8.2 meters away. What is her "takeoff" speed v0?Homework Equations
x = x0 + v0t + 1/2at^2
v^2 = v0^2 + 2ad
v = v0 + atThe Attempt at a Solution
I can't seem to figure this problem out. Here's the...