If there is a frictional force opposing the motion of the sled:
Does this frictional force do work on the sled?
- No, the frictional force does no work.
- Yes, the frictional force does work.
- Only part of the frictional force does work.
- You can't tell from this diagram.
Since the frictional force is antiparallel to the distance moved,
it does negative work on the sled.
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Date of last modification: Summer , 2019