1. The problem statement, all variables and given/known data Ok so the problem is this: A car of a mass 960kg is free-wheeling down an incline (15 degrees to the horizontal) at a constant speed of 9.0 m s^-1 - Deduce that the average resistive force acting on the car is 2.4*10^3N 2. Relevant equations F=ma I suppose, but it hasn't got me anywhere yet really any help would be appreciated. 3. The attempt at a solution I calculated that the force should be F=mg = 960kg*9.81 = 9417.6N. Now I don't see how this will help in deducing the resistive force, but since the velocity is constant the resistive force should balance out any other force acting on it. Any help will be appreciated. Thanks.