3 boys push a small car 25 m up a hill inclined at 19° to the horizontal. The car has a weight of 860 N and they push it at a steady speed of 0.5 m s-1 against an opposing force of friction of 70 N acting down the hill.
- By considering all the forces acting on the car, calculate the net force.
- Determine the size of the boys' combined push force.
- Determine the combined average power output of the boys.!