- #1
Medgirl314
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Homework Statement
A boy launches a toy helicopter from the ground beside a building. It accelerates upward at 15 m/s^2. At the same time, another boy throws a rock down from the top of the building, which is 60 m above the ground. the helicopter and the rock collide at a height of 30 m. How fast was the rock thrown?
Going of the problem:
a=15 m/s^2 a=-8.8 m/s^2
x=30 m x=30 m
xinitial= 60m xinital=60 m
v? v=?
Homework Equations
v^2=2aΔx
The Attempt at a Solution
I tried averaging the numbers and used the above equation to get the average velocity. I got ≈12.5 m/s. However, I'm not sure if average velocity is exact enough for this problem. Does anyone have an alternate suggestion?
Thanks!