Hey, so I just finished taking a physic's test and one of the question was interesting to me. I thought it was pretty simple but my friend did the problem a different way, so I'm wondering what's the correct way to do this problem. So a box is moving down a frictionless ramp and onto the floor. The floor has a coefficient of friction and you have to find the distance it travels before stopping. I said that the speed the box has at the bottom of the ramp is the same speed the box initially has on the floor. My friend says that the speed of the box from bottom of ramp decreases when it goes onto the horizontal floor because it's approaching the horizontal floor at an angle. He told me that the vertical component of the velocity at the bottom of the ramp would be gone once it reaches the floor and your initial velocity on the floor is just the horizontal component of the velocity at the bottom of the ramp. What's the correct way to do this problem? Thanks!