Simple Machines Unit Test Review

What is the formula for WORK?

• W = D / F

• W = F + D

• W = F x D

• W = D - F

Why do wheels spin on their axle or shaft?

• To help reduce friction

• To help increase friction

• To create more friction, enabling it to spin faster

• To make work more difficult

You trade distance for force when using a __________ lever

• 1st class

• 2nd class

• 3rd class

• 4th class

A lever can be defined as a stiff bar that rests on a _______________

• incline plane

• pipe

• axle

• fulcrum

A ____________ is a simple machine that is used to push something apart

• lever

• fulcrum

• wedge

• wheel and axle

What simple machine can be used to split things apart and also it can hold open a door?

• Lever
• Pulley
• Wedge
• Screw

What simple machine holds things together?

• Wedge
• Screw
• Lever
• Pulley

What simple machine has a fulcrum and can be used to lift a weight?

• Pulley
• lever
• screw
• wedge

What simple machine has a wheel with a groove on it that keeps a rope in place?

• pulley
• lever
  lever
• screw
  wedge
• wedge
  screw

A wheelbarrow is an example of

• First Class Lever
• Second Class Lever
• Third Class Lever
• Fourth Class Lever