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Using Machines

Using Machines

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SWBAT explain how a machine makes work easier.

SWBAT calculate the mechanical advantage and efficiency of a machine. 

SWBAT explain how friction reduces efficiency. 

Machines can't change the amount of work you need to do, but they can make doing work easier. 

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Tutorial

Vocabulary

friction

input force 

output force

mechanical advantage

efficiency

Mechanical Advantage - Pulleys

Explanation of force, Newtons, and mechanical advantage of simple machines in the context of pulleys.

Pulleys - Simple Machines

Fixed and movable pulleys

Eureka! Episode 13 - Mechanical Advantage and Friction

Cartoon comparing the efficiency of inclined planes and levers in the context of friction.