(adsbygoogle = window.adsbygoogle || []).push({}); 1. A girl coasts down a hill on a sled, reaching

a level surface at the bottom with a speed

of 7 m/s. The coefficient of kinetic friction

between runners and snow is 0.054, and the

girl and sled together weigh 749 N.

The acceleration of gravity is 9.8 m/s2 .

How far does the sled travel on the level

surface before coming to a rest? Answer in

units of m.

2. F= ma

f= mewN

W=mg

Vf^{=vo+2ad}

3. I figure I need to know the accleration at the instant she reaches bottom of the hill to use a kinematics formula to solve for the distance, but I cannot figure it out without the angle of the incline. Plus, I don't know how to factor friction into that.

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

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: Forces with friction- How fard does the sled travel?

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