- #1
elasticities
- 25
- 0
Homework Statement
If the rock is thrown from the top of the building with a velocity of 5m/s [Up].
And you know acceleration due to gravity is 9.81m/s^2 [Down].
And the height of the building is 50m.
Please help! I can't find the time for it to reach the bottom! I am letting up be positive!
Homework Equations
d = V1(t) +1/2(a)(t^2)
That's the only one I can think of! Help!
The Attempt at a Solution
The only way I can do it is to plug in the givens into the formula, am I doing it right or is there something more?
-50=5(t)+1/2(-9.81)(t^2)
0=-4.90500(t^2)+5t+50
t=3.74s or t=-2.73s
I feel stupid, please help!