- #1

saralsaigh

- 19

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**Sled question**I have a physics midterm tonite and i was trying some of the practice tests and i got stuck on this question, ur help would be greatly appreciated :)

**1. The problem:**

A sled is traveling at 4.00m/s along a horizontal stretch of snow. The coefficeint of kinetic friction is Uk=0.05 and the coefficient of static friction Us=0.07. How far does the sled go before stopping?

**2.This is my thought process:**

Ok I am assuming its moving at constant speed and the acceleration is negative so i drew the FBD with weight down, normal forced up and force of kinetic friction to the left. (Assuming its moving to the right) i thought that Fnet= force of friction (x-direction) = m a , and that by solving for acceleration i can use it to find out the distance however i don't have mass so I didnt know wat to do?! Any suggestions?

**3. The answer is actually 16.3m**