- #1

DRC12

- 41

- 0

## Homework Statement

A skateboarder starts up a 1.0--high, 30 ramp at a speed of 7.9 . The skateboard wheels roll without friction. How far from the end of the ramp does the skateboarder touch down?

## Homework Equations

x=x

_{0}+v

_{0}t+.5(a)(t

_{2})

v=v

_{0}+at

## The Attempt at a Solution

This question seems pretty straight forward and I've found an answer but the website we use says it's wrong. First I found v

_{x}=7.9cos(30)=6.84 and v

_{y}=7.9sin(30)=3.95. I tried finding maximum y by solving v

_{y}=0=-9.8*t

_{1}then t

_{1}=.405 and plugging that into y=1.8 then finding t

_{2}when y=0 and y

_{0}=1.8 to get t

_{2}=.605 so t

_{total}=1.01 and plugging that into x=6.913