Register to reply

Incline Skier

by HT3
Tags: incline, skier
Share this thread:
Oct8-07, 02:19 PM
P: 23
1. The problem statement, all variables and given/known data
A skier is gliding along at 3m/s on horizontal frictionless snow. He suddenly starts down a 10 degree incline. His speed at the bottom is 15 m/s.
a) what is the length of the incline?
b) how long does it take for him to reach the bottom?
we know:

2. Relevant equations
V^2=Vo^2 +2ax

3. The attempt at a solution
i need help to find what the a is...and why it is that.
Phys.Org News Partner Science news on
Pilot sites in energy from coffee waste show good results
Startups offer banking for smartphone users
Factor in naked mole rat's cells enhances protein integrity
Oct8-07, 02:57 PM
P: 492
the only force acting on the skier is gravity but since the skier is going down a 10 degree incline gravity is giving him some acceleration but not 100% of it's full foce.

draw the Free Body Diagram and split up gravity into it's components where the acceleration will be parallel to the incline.
Oct8-07, 05:22 PM
P: 23
okay from my freebody diagram i get sin(10)=9.8/a
and that is wrong....if anyone could explain to me how to do it properly greatly appreciate it because i have my exam very soon.

Oct8-07, 05:51 PM
P: 492
Incline Skier

it should be 9.8*sin(10). the force acting parallel to the inclined plane is mgsin(theta).

Register to reply

Related Discussions
Extreme skier Introductory Physics Homework 2
Skier question Introductory Physics Homework 1
Skier Swoops Introductory Physics Homework 6
Physics skier help please Introductory Physics Homework 1
Skier down a slope Introductory Physics Homework 2