- #1

brendonsushi

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## Homework Statement

Frog jumps in air to 1m height. Neglecting air resistance find initial speed the instant it leaves the ground.

a= -9.8m/s^2

d= 1m

vi=?

## Homework Equations

d=1/2(vf+vi)t

d=1/2at^2 + vi(t) + di

## The Attempt at a Solution

I figured that since acceleration is 9.8m/s, I could just find time by dividing 9.8m/s by 9.8 and that would give me 1m/0.1s, but that doesn't seem quite right. I then proceeded to put the acceleration, distance, and "time" values into d=1/2at^2 + vi(t) + di, so that vi=0.9m/s^2, but I don't think I did it right. Is there any way to just find initial velocity with only acceleration and distance values?