[SOLVED] Work-Energy Method 1. The problem statement, all variables and given/known data A car is stopped by a constant friction force that is independent of the car's speed. By what factor is the stopping distance changed if the car's initial speed is doubled? (Solve using work-energy methods.) 2. Relevant equations Wtotal = delta K 3. The attempt at a solution From what the problem is stating, is that friction force, is seperate from car's speed. ''if the car's initial speed is doubled?'' K1 = 1/2(m)(2v)^2 I know the answer is 4, but I don't comprehend, what is the car's initial speed is tripled, would it be 6?