- #1
Archedcutie
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1. Homework Statement
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. Homework 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 :(
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. Homework 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 :(