CP Ch05.7 Machines

What is a machine primarily used for?

• Cooking food

• Multiplying forces

• Playing music

• Writing books

According to the text, what happens to energy?

• It is created and destroyed

• It is never created or destroyed

• It is only created

• It is only destroyed

What is considered the most simple mechanical machine?

• Pulley

• Wheel and axle

• Lever

• Inclined plane

Can any lever or machine multiply work or energy?

• Yes, they can

• No, they cannot

• It depends on the type of lever or machine

• Sometimes they can

What principle do all machines follow?

• Conservation of momentum

• Law of inertia

• Conservation of energy

• Law of gravity

Who understood the principle of the lever in the 3rd century BC?

• Galileo

• Newton

• Archimedes

• Einstein

What components do mechanical machines use?

• Levers and pulleys

• Gears and belts

• Springs and screws

• Wheels and axles