Carbon atoms and hydrogen I hope this helps
Answer:
Work done, 
Explanation:
Displacement,
Force, 
Work done by the opponent do on the football player is given by :
So, the work done by the opponent do on the football player is 
.
Why: As the steel ball rolls uphill, the velocity gradually decreases and finally the ball stops, thus, the acceleration will be in the opposite direction of motion (that is downhill). After the stop, the ball will start rolling downhill by an increasing velocity, thus, the acceleration in this case will be in the same direction as the motion (downhill again).
Lever because if you can bend your elbows
