- #1

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## Homework Statement

1) The coefficient of kinetic friction for a 22-kg bobsled on a track is 0.10. What force is required to push it down at a 6.0 degree incline and achieve a speed of 60 km/h at the end of 75 m?

2) A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.20 and the push imparts an initial speed of 4.0 m/s?

## Homework Equations

F = ma

Force of friction = (mu)k x normal force

## The Attempt at a Solution

I calculated the net force in #1 to be 1.06 after getting the components of gravity on the box, but this seems incorrect. I don't know where to go for both problems, especially #2. Where do you start when the mass of the box is not given?