1. The problem statement, all variables and given/known data What is the minimum work needed to push a 1200Kg car, 118m up 18 degree incline with no friction? 2. Relevant equations I used mgsin18 - mgcos18 (don't think this is right) I know with friction, you do mgsin18 - (coef. friction)(mg)(cos18), and then to get work you multiply that answer by the distance. But without friction it doesn't work the same way, but I'm not sure what to do. 3. The attempt at a solution using mgsin18 - mgcos18, I get a negative answer which is wrong. The correct answer is 4 x 10^5, but I get -7290. WAY off!