(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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?

2. Relevant equations

3. 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

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# Homework Help: Antiderivatives and motion

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