The unit of work is called a

An Ideal machine has an efficiency of

If you do 2,000 J of work using a hammer. The hammer does 1,500 J of work on the nail. What is the efficiency of the hammer? (Efficiency = output work / input work x 100%)

A machine can make work easier by

An ax, zipper, and a front tooth are examples of a simple machine called a

You divide the radius of a wheel by the radius of an axle. What are you calculating?

A car's steering wheel is an example of a simple machine called a

The fixed point that a lever rotates around is called a(n)

Compound machines are

When you bend your arm at the elbow, the fulcrum is at your

In order to do work on an object, the object must ____________________ as a result of the force

A machine's _____________________ is the number of times a force exerted on a machine is multiplied by the machine.

In a screwdriver, the handle is the wheel and the shaft is the _____________________

Muscles are attached to bones by ______________________

The more EFFICIENT a machine is, the closer the ACTUAL mechanical advantage is the _____________________

A machine DECREASES the amount of work you do

An inclined plane wrapped around a central cylinder is a LEVER

A rope wrapped around a grooved wheel is a PULLEY.

A single fixed pulley, such as a flagpole, changes the AMOUNT of the input force

When you bite into a sandwich, your front teeth act as WEDGES.

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