Answer :
Final answer:
In cases where the force is perpendicular to the block's motion or the block does not move, no work is done by force F.
Explanation:
No work is done on the block by force F when:
- The force is applied perpendicular to the block's motion.
- The block does not move.
Examples from physics:
- Force applied vertically where the block doesn't move indicates no work done.
- In a scenario with constant speed and balanced forces, no work is done.
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