Simple Machines

What is a machine?

• Two or more simple machines combined.

• A machine that requires a motor.

• A device that makes it easier to do work.

• None of the above.

What is a simple machine?

• A device that makes work easier.

• Two or more simple machines combined.

• A device that multiplies a force.

• A machine that does not need a motor.

What is a complex machine?

• A machine that needs a motor.

• A machine that is a combination of two or more simple machines.

• A machine whose mechanical advantage is ten.

• None of the above.

What is the name given to the part of the lever where it pivots?

• The effort arm.

• The resistance arm.

• The fulcrum.

• The bar.

In a first class lever, which part is found in the middle?

• The effort

• The fulcrum

• The load

• None of the above.

In a second class lever, what structure can be found in the middle?

• The fulcrum

• The effort

• The load

• Both the fulcrum and the load

In a third class lever, what structure is situated in the middle?

• The effort

• The fulcrum

• The load

• None of the above.

What is the mechanical advantage of the lever shown in the diagram?

• One

• Two

• Three

• Four