1. The problem statement, all variables and given/known data In terms of mechanics, does negative Work produce negative Power? If so, what is negative mechanical Power? 2. Relevant equations W=F*d P=W/t 3. The attempt at a solution I know if a car is rolling downhill and I try to push against it, but I end up getting pushed backward, I'm doing negative Work because the car is moving in the opposite direction of the force applied against it. Does this mean I'm producing negative Power? If so, what does it mean in practical terms? (It's been 30 years since high school physics, and I'm really at the limit of what I remember.) Thanks!