Simple Machines

Often used to hold things together. 

• inclined plane
• screw

a wheel with a rope or belt around it. Helps a person lift or move something up, down, or across an area. 

• screw
• pulley

(3.2) What is Mechanical Energy?

• Kinetic
• Potential
• Thermal Energy
• The sum of kinetic and potental energy that causes force to move an object any distance.

What is the law that states that energy cannot be created or destroyed only transform form one energy to another?

• Law of Conservation of Energy
• Law of Gravity
• Law of Inertia
• None of these

What is the unit used to measure Power?

• Joule
• Watt
• Newton
• Pascal

What is the unit used to measure work?

• Joule
• Watt
• Newton
• Pascal

Which is an example of someone using a simple machine to do work?

• a boy runs across a football field
• a banker counts money
• a mother pushes a stroller up a ramp
• a girl eats a sandwich

A fishing pole is an example of a compound machine. What simple machines are used to make up this compound machine?

• lever, wheel and axle, pulley
• wheel and axle, inclined plane, pulley
• wheel and axle, pulley, inclined plane

What is a force that opposes motion between two surfaces that are touching?

• gravity
• friction
• lubricant
• attractive forces

A bar that moves around a fixed point called a fulcrum

• lever
• inclined plane
• pulley