Question: 1. Can work be done by a moving object on itself? 2. Has a man swinging a sledgehammer done work if he misses the stake

1. Can work be done by a moving object on itself?
2. Has a man swinging a sledgehammer done work if he misses the stake at which he is swinging?
3. Develop the units associated with work from the components of the definition: work = force x displacement.
4. Is work a vector quantity?
5. Is work being done on a boulder by gravity?

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