Problem 1
A sled of mass starts from rest on a smooth ramp of length at to the horizontal. It enters a rough horizontal track with kinetic-friction coefficient . Neglect air resistance and use . (a) Find acceleration and speed at the ramp bottom. (b) Find stopping distance on the horizontal track. (c) If that track is only long, does the sled stop before its edge? Keep the sign convention consistent and use appropriate SI units throughout. Each part builds on intermediate results from the preceding part; apply a physical relation only where the stated model assumptions hold. Finally compare the answers with the initial conditions, expected trends, and an independent check when available.
problems.proof.stepOf
problems.proof.analysis
Check against a limiting case, a stated condition, or an energy balance. A sound result must have the expected physical trend.