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

A Pole vaulter leaves the ground to travel 4.0 m up and over the bar, and then another 4.0 m back to the ground. It takes 1.81 s for the whole trip. Caculate the velocity with which she left the ground.

2. Relevant equations

Well the equation I used which I saw in my textbook was, v1[initial speed] = d-1/2[g][t]^2

3. The attempt at a solution

I subbed it in as v1= 8m- 1/2 [9.8N/kg][1.81s]^2

and I didn't get 8.8m/s [up] like the answer at the back of the textbook :(

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# Homework Help: Acceleration due to Gravity: calculate initial velocity

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