Homework Help

1. Oct 18, 2007

NJCarter15

Homework Help!!

1. The problem statement, all variables and given/known data
Gloria, who has mass 60. kg, is skiing on the famous frictionless ski slopes. The slope is making an angle of 30o with the horizontal. How fast, in m/s, will Gloria be going after 10 seconds on the slope?

2. Relevant equations
d = v x t vavg = ½ (vf + vi) vf = at + vi
a = (vf - vi) / t d = vi t+ ½ at 2 vf2 = vi2 + 2ad
d = (vf2 - vi2)/2a
F = ma
Elevator Problems: Fnet = Fapplied + Fgravity
Force at an angle and skier problems: SOHCAHTOA
g = acceleration due to gravity = -10 m/s2;

3. The attempt at a solution
I Identified:

Mass= 60
Time = 10 seconds
Angle = 30 degrees

Then here's my attempt:

Fapplied = cos(60) = Fapplied/600N

Fapplied = 300N

Now what?

2. Oct 18, 2007

NJCarter15

Anyone Out There To Help!!!

3. Oct 18, 2007

malty

Glorias going down a slope, so you'll need to know the component of her weight that is actually acting on her, once you've resolved this component, you can treat it as linear system so your equations of motion become valid. How exactly then would you go about getting the velocity? You know the time . . .