Skills for analyzing processes using the work-energy principle A puck of ma...

Skills for analyzing processes using the work-energy principle

A puck of mass m moving at speed vi on a horizontal, frictionless surface is stopped in a distance Δ x because a hockey stick exerts an opposing force of magnitude F on it. (a) Using the work-energy method, show that (b) If the stopping distance Δx increases by 50%, by what percent does the average force needed to stop the puck change, assuming

that m and v_i are unchanged? Justify your result.