- #1
Nitrate
- 75
- 0
Homework Statement
A stone is thrown up at 30 m/s from the edge of a bridge 210 m above the river below. How many seconds elapse between toss and splash?
Homework Equations
The Attempt at a Solution
dv/dt=-9.8
v=-9.8t+c2
30=-9.8(0) + c1
c1=30
v=-9.8t+30
h=-4.9t^2+30t+c2
210=-4.9(0)^2+30(0)+c2
c2=210
h= -4.9t^2+30t+210
i'm not sure if I'm doing this right/what to do next if i am