(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Suppose a slide similar to Der Stuka is 36.0 meters high, but is a straight slope, inclined at 45° with respect to the horizontal.

(a) Find the speed of a 51.1 kg thrill seeker at the bottom of the slide, assuming no friction.

26.5 m/s

(b) If the thrill seeker has a speed of 22.6 m/s at the bottom, find the change in mechanical energy due to friction.

-4978 J

(c) Find the magnitude of the force of friction, assumed constant.

____ N

2. Relevant equations/attempts

Magnitude of F = W/change in X, but no X is given, just Y.

I know F= mu/N and I found normal force to be [51.1 kg*9.8 m/s^2 cos(45)]=354 N

I am stuck there and cannot think of a way to calculate mu.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Magnitude of Force of Friction

**Physics Forums | Science Articles, Homework Help, Discussion**