Work and Simple Machines (7.P.2.4)

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Simple machines decrease the amount of work. True or False?

A simple machine that is a straight, slanted surface, and facilitates the raising of loads

What is the formula for work?

two or more simple machines put together

a simple machine that consists of a wheel over which a rope, chain, or wire passes

a simple machine that has a bar that pivots at a fixed point called a fulcrum

Which simple machine would be the most efficient for lifting an object 30 m off the ground?

Efficiency is never 100% because of friction. True or False?