Examples of Simple Machines

What is work?

• The amount of energy to move an object

• A force that opposes motion

• A type of friction

• A type of simple machine

What do simple machines do?

• Make work impossible

• Allow you to do the same work with less effort

• Decrease the amount of work

• Increase the amount of work

How many simple machines are mentioned?

• 6

• 3

• 4

• 5

Which is NOT a simple machine?

• Lever

• Wedge

• Pulley

• Friction

What is a lever?

• A long beam and a fulcrum

• A flat surface raised at an angle

• A wheel with a groove

• A type of friction

What does a pulley use to lift heavy objects?

• A beam

• A groove and a rope

• A flat surface

• A wheel and axle

What is friction?

• A way to increase energy

• The force that opposes motion

• A simple machine

• A type of lever

Which type of friction occurs between solid surfaces?

• Static friction

• Sliding friction

• Rolling friction

• All of the above

What is used to decrease friction?

• Skateboard wheels

• Wax

• Sandpaper

• Oil