 #1
 299
 0
Homework Statement
The profile of a ski slope is shown below. The section QR inside the dotted box is parabolic in shape. The ski slope at point R is at 45degrees to the horizontal
A 75kg skier moves down the slope from P to Q and continues to R and beyond. Assume that the skier is a point mass, and air resistance and friction are negligible.
Question1. Is it possible for the skier to experience weightlessness while moving along the entire path QR. Explain.
Question 2. To achieve the situation in question 1, the skier must move at a certain speed at point Q. In terms of V, what is the magnitude of the vertical component of the skier at point R.
Homework Equations
W=mg and perhaps a=gsintheta
The Attempt at a Solution
acceleration due to gravity is 10m/s/s and has to equal gravitational field strength of 10 N/kg.
Using a=gsintheta, i substitue angle 45 to get 10sin45 which equals 7.07m/s/s. Not sure if this is correct so far. Dont know wehre to go now.
Attachments

6.1 KB Views: 305
Last edited: