- #1
Tuvshee
- 9
- 0
Homework Statement
It says: A car moves at a constant speed of 5.0ms-1 along a 6.0km road against frictional force of 150N per meter. How much work has to be done by the car to maintain its constant speed?
Homework Equations
W = F*d
The Attempt at a Solution
So I just did 150N * 6000m = 900000J = 900kJ
But what about the 5ms-1? Is that important? I'm guessing it is since it is mentioned, but I don't know how to apply it. And the answer sheet says 9000kJ (and not 900kJ). Please help me? I'm confused, thank you.