Levers

Levers make work ________.

• Harder
• Easier
• Alright
• OK

Unit of force.

• Meter
• Centimeter
• Newton

In a simple machine, what is the effort?

• the force needed to move the load

• the distance the load travels

• the mass lifted by a system

• the object being moved

What is the point where the lever arm pivots?

• load

• fulcrum

• mass

• effort

What is definition of the effort?

• The fixed point or pivot
• The point where the force is applied 
• The point where the weight/resistance is coming from

The diagram shows a crowbar used to lift an object. What parameters should be change to lift heavy object with small effort applied?

• Decrease distance r1

• Increase distance r1

• Increase distance r2

• r1 must be same as r2