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Homework Statement
1. What type of energy is involved in weighing something on a spring scale?
2. What type of energy is involved in winding a watch?
3. Is a machine's efficiency increased if the work done against the resistance force is decreased or if you decrease the work against friction?
4. Is the amount of work decreased if the efforts needed are multiplied or if the effort distances are multiplied? (either, both, or neither).
Homework Equations
F=ma
The Attempt at a Solution
I cannot seem to grasp these concepts! Any help would be greatly appreciated! :)