# Work and Energy of a box

1. Mar 1, 2009

### blazeuofa

1. The problem statement, all variables and given/known data
A box has an intial speed of 10 m/s. It slide across a flat section and then up an incline. Use L=20m, $$\mu$$k=.1, and $$\theta$$= 40 degrees. Note that I have not given you the mass. It will cancel out of all the equations in the end.

a. Determine the speed of the box at the end of the flat section
b. Determine the distance D it slides up the incline before coming to a complete stop.

2. Relevant equations

3. The attempt at a solution

What are the equations I would start with to begin this problem?

2. Mar 1, 2009

### Delphi51

Do you have a formula for calculating the force of friction?
This force causes the box to accelerate - you'll need the formula for that.
And accelerated motion formulas to find the speed.