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What is the main purpose of machines according to the text?

• To increase friction

• To reduce the weight of objects

• To help us do work more quickly, easily, and safely

• To create energy

Which of the following is NOT a type of simple machine mentioned in the text?

• Complex Machine

• Inclined Plane

• Lever

• Wedge

What is a lever defined as in the text?

• A device that uses energy to help you do work

• A machine that can lift heavy things

• A type of complex machine

• A tool with no moving parts

Which simple machine is described as a surface with a slope?

• Pulley

• Inclined Plane

• Screw

• Wedge

Which of the following is an example of a complex machine?

• Wedge

• Inclined Plane

• Bicycle

• Hammer

A seesaw is an example of what type of simple machine?

• wheel and axle

• lever

• wedge

• pulley

What type of simple machine makes chopping wood easier?

• inclined plane

• screw

• wedge

• lever

What type of simple machine is shown here?

• Pulley
• Wheel and Axle
• Lever
• Wedge

The ____________ consists of a rod attached to a wheel, and makes it easier to move or turn things. A door knob is an example of this simple machine.

• lever

• pulley

• wheel and axle

• wedge

A door stop is an example of a

• Screw
• Wedge
• Lever
• Inclined Plane