1. The problem statement, all variables and given/known data A 100 kg man sitting on a frozen lake throws a 1.5 kg boot horizontally with a speed of 20 m/s. He is 5m from the shore and the coefficient of kinetic friction is 0.0009. How long does it take for him to reach the shore? 2. Relevant equations ∑ F = m*a v2 = v02 + 2a(x − x0) v = v0 + at p=mv F̅ Δt = m Δv 3. The attempt at a solution The one part I'm really having a problem with is finding the force. I planned on using p=mv to find initial velocity of the man (0.3 m/s), then ∑ F = m*a to find acceleration, v2 = v02 + 2a(x − x0) to find final velocity, and v = v0 + at to find time. However because I'm not clear on how to calculate the force, I'm not able to solve for the other variables. I do believe my teacher mentioned the only force is of friction (mg*µ=.882N) but is it correct to make the assumptions that make this true? Thank you!