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

An object is given an initial velocity of 3.0 m/s up a 20 degree incline. Mass= 22.3 kg and coefficient of kinetic friction is .93.

2. Relevant equations

W = (1/2)mv_{1}^2-1/2mv_{0}^2

W = Fdcos(u)

3. The attempt at a solution

So I added the forces together, mgsin(20) + .93mgcos(20)

and this times cos(20) should be the total work, right?

so then since the change in kinetic energy equals work i set -(1/2)mv^2= -Fdcos(20)

plugging in the mass for m, initial velocity for v, the forces due to friction and gravity for F, and solving for d, i got the wrong answer. where'd i go wrong? I also tried this taking out the cos(20) in the second work equation and still got it wrong.

Thanks, this is my first time using physics forums and i really hope i can get to understand this stuff...

**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: Kinetic energy- pushing an object up an incline.

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