The rate at which energy is transferred

The number of times a machine multiplies force

A machine with a grooved wheel that holds a cable

In which situation is a person doing work on an object?

Which of the following are simple machines used by Eqyptians to build pyramids?

If a barbell weighs 160 N, what other information do you need to calculate how much work it takes to lift it?

How does a ramp make lifting a heavy object easier?

If an identical stack of books is lifted the same distance and one person does the job twice as fast, which of the following is done twice as much?

By conparing the mechanical advantage of two machines, what can you tell about the machine?

If the work output of a machine is always less than the work input, where does the missing work go?

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