# Degrees slope?

• Sep 30th 2012, 05:20 PM
Oldspice1212
Degrees slope?
An apple falls from an apple tree growing on a 20° slope. The apple hits the ground with an impact velocity of 2.6 m/s straight downward. What is the component of the apple's impact velocity parallel to the surface of the slope.

I don't really understand what they mean by 20 degrees slope, what formula do I use?
• Sep 30th 2012, 05:50 PM
skeeter
Re: Degrees slope?
tilt the coordinate axes 20 degrees w/r to the horizontal ...
• Sep 30th 2012, 06:38 PM
Oldspice1212
Re: Degrees slope?
So I just have to 2.6m/s(cos 20)?
• Oct 1st 2012, 03:01 AM
skeeter
Re: Degrees slope?
Quote:

Originally Posted by Oldspice1212
So I just have to 2.6m/s(cos 20)?

parallel to the slope would be $2.6\sin(20)$

perpendicular to the slope is $2.6\cos(20)$