wheel, axle and gears

Wheels, levers, pulleys, ramps, screws, and wedges are forms of _______________________.

• potential energy

• simple machines

• chemical changes

• dark matter

Simple machines change the size and __________ of forces.

• color

• direction

• work

• property

A catapult is an example of a _________ .

• lever

• wheel and axle

• screw

• inclined plane

Gears are wheels with teeth.

• True

• False

Another name for a ramp =

• axle

• pulley

• lever

• inclined plane

Which of the following is not an example of a ramp? (inclined plane)

• 
• 
• 
• 

A circular object that revolves with or around an axle

• Wheel
• Axle
• Force
• Work

The resistance that one surface or object encounters while in contact with and moving across another

• Friction
• Radius
• Load
• Wheel

A push or a pull

• Force
• Friction
• Wheel
• Effort

A force applied to a machine to do work

• Effort
• Force
• Axle
• Load