Science Week 11 Simple Machines - Part 2

A simple machine consisting of a rigid bar that pivots on a support and is used
to lift a load with less effort

• Effort arm

• Lever

• Resistance

• Effort

• Fulcrum

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

the point on a lever where the lever pivots (the turning point)

• Effort Arm

• Lever

• Resistance

• Effort

• Fulcrum

the load placed on a lever that needs to be moved

• Effort arm

• Lever

• Resistance

• Effort

• Fulcrum

The point on a lever where force is applied

• Effort Arm

• Lever

• Resistance

• Effort

• Fulcrum

The force applied to a lever to move a load

• Effort Arm

• Lever

• Resistance

• Effort

• Fulcrum

A wheelbarrow is

• First-class lever

• Second-class lever

• Third-class lever

• Not a lever

Your forearm is

• First-class lever

• Second-class lever

• Third-class lever

• Not a lever

A seesaw is

• First-class lever

• Second-class lever

• Third-class lever

• Not a lever

Which lever(s) allow the user to move a load by applying less force over a
greater distance?

• First and Third class

• Second and Third-class

• First and Second-class

• Only Third

Which lever(s) allow the user to apply a greater force than the weight of the
resistance and move the load a greater distance in a shorter time?

• First and Third-class

• Second and Third-class

• First and Second-class

• Only Third