1. The problem statement, all variables and given/known data A 55 g particle is moving to the left at 27 m/s. How much work must be done on the particle to cause it to move to the right at 41 m/s? Answer in joules 2. Relevant equations 3. The attempt at a solution 27-(-41)=68 , 68*55= 3750 the units here are grams m/s. I need joules. I have no clue on how to make that happen. I can change the g to kg and even get it to newtons (since I know a joule= newton-meter) , but I can't take it any farther. Please help!