[SOLVED] Coefficient of friction on an inclined plane 1. The problem statement, all variables and given/known data The problem I have is to determine the coefficient of kinetic friction between two wooden objects, a block and a ramp, using the fewest measurements possible. The initial velocity will be 0. I can measure the angle of incline, the distance travelled along the ramp, the time taken, but should not have to measure mass. I do not currently have any values, but should create an equation. Can I do this, and if so, am I on the right track? 2. Relevant equations Fnet = ma Ff = μFN Δd = V1Δt + ½aΔt² 3. The attempt at a solution Fnet = ma Ff - Fg║ = ma Ff - Fg sin θ = ma Ff - mg sin θ = ma Ff = 2Δd/Δt² - g sin θ μFN = 2Δd/Δt² - g sin θ μFg┴ = 2Δd/Δt² - g sin θ μFg cos θ = 2Δd/Δt² - g sin θ μ = [(2Δd/Δt²) - g sin θ] / Fg cos θ μ = [(2Δd/Δt²) - g sin θ] / mg cos θ Note:The substitution of acceleration for 2Δd/Δt² in the 5th line is from the equation Δd = V1Δt + ½aΔt² where V1Δt evaluates to 0.