A child applies a force F parallel to the x -axis to a 10.0-kg sled moving on th
ID: 1425426 • Letter: A
Question
A child applies a force F parallel to the x -axis to a 10.0-kg sled moving on the frozen surface of a small pond. As the child controls the speed of the sled, the x -component of the force she applies varies with the x -coordinate of the sled as shown in the figure.
1. Calculate the work done by the force F when the sled moves from x=0 to x=8.0m.
2. Calculate the work done by the force F when the sled moves from x=8.0m to x =12.0m.
3. Calculate the work done by the force F? when the sled moves from x=0 to x =12.0m.
Explanation / Answer
work = F.S area under curve
a) W= 40 Joule
b) W=20 Joule
c) W=60 Joule