LEVER

A simple machine that consists a rigid bar that pivots on a fixed point

• lever

• pulley

• wheel and axle

• fulcrum

Which of the following is NOT a simple machine?

• lever
• pulley
• inclined plane
• ring

What is a simple machine?

• A device that helps reduce the amount of force required to do work
• A device that helps increase the amount of force required to do work

What is a lever?

• •a moveable bar that cannot move around a fixed point, called a fulcrum.
• •a rigid bar that is free to move around a fixed point, called a fulcrum.
• •a moveable bar that is free to move around a fixed point, called a fulcrum
• •a rigid bar that cannot move around a fixed point, called a fulcrum

The place where a lever pivots is called the _______.

• Load
• Force/Effort
• Fulcrum
• Rigid Bar

What class of lever is this?

• 1st class
• 2nd class
• 3rd class
• None of the above

Which type of lever is this?

• First Class Lever
• Second Class Lever
• Third Class Lever
• Coach  Class Lever

A see saw is an example of a:

• 1st class lever
• 2nd class lever
• 3rd class lever

A wheelbarrow is an example of a:

• 1st class lever
• 2nd class lever
• 3rd class lever

Levers make work ________.

• Harder
• Easier
• Alright
• OK