1. The problem statement, all variables and given/known data Is the amount of work depending on the mass? 2. Relevant equations W=F*s F=m*a 3. The attempt at a solution attempt one: because if you have a higher mass, it takes longer to make a certain object move over a certain distance, but it doesn't matter because time isn't measured. For example move a 4kg block over 3 meters with 6 newton or move a 20 kg block over 3 meters with 6 newtons, the work remains the same (3*6=18J). Attempt two: But when the mass is increased, in the formula F=m*a, the force is increased. So the work in the situation above should be increased? thereby making the work (20/4=5) 5 times bigger. What am i doing wrong?