Physics, 15.11.2019 07:31, maddyf7253

30 points! answer at least one and how you found it! : )
find the mechanical advantage or efficiency:
1.a winch lifts a 4,000n piano 1m by applying 500n over a distance of 10m.
2.a 100n force is applied to a bicycle in its top gear and 50n of force is output.
3.50 pounds of effort to lift a 100 pound box with a machine.
4.impossible efficiency that violates conservation of energy

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30 points! answer at least one and how you found it! : )
find the mechanical advantage or...