I'm unsure whether I have done the following problem correctly :)(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

A ball is kicked at from the slope as shown.

When will the ball hit the slope?

http://img90.imageshack.us/img90/8084/slopevi0.th.jpg [Broken]

2. Relevant equations

The distance travelled can be expressed in two components:

Sx=vt

Sy=0.5gt^2

The displacement compontents can also be expressed in terms of tan(a)

tan(a)=Sy/Sx

3. The attempt at a solution

Substituting we get:

Sy=Sx*tan(a)

0.5gt^2=vt*tan(a)

0.5gt=v*tan(a)

t=[2v*tan(a)]/g

Is this correct?

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# Homework Help: Projectile motion - have i done this correctly?

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