What is a complex machine?

• A machine with many parts

• A machine made of complex materials

• A machine that uses advanced technology

• A machine that combines two more simple machines to perform work

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

• A screwdriver

• A bicycle

• A wheelbarrow

• A pair of scissors

How do complex machines differ from simple machines?

• They are more difficult to learn and use than simple machines

• They are cheaper to use than simple machines

• They do not use simple machines, but complex machines in their design

• They perform more complex tasks by combining simple machines

Which type of complex machine is used for lifting heavy objects?

• Crane

• Pulley

• Screwdriver

• Seesaw

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which of the following is NOT a simple machine commonly found in complex machines?

• Pulley

• Magnet

• Lever

• Screw

How does a bicycle employ the use of multiple simple machines?

• Screws and bolts that hold the parts of the frame together

• The handlebars act as a lever to turn the bicycle

• The wheels of the bicycle and the pedals act as wheel and axles

• All of the above

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which of the following are NOT a component of the complex machine?

• Power source (provides energy to the machine)

• Transmission (distributes energy within the machine)

• Output Mechanism (converts energy into useful work)

• Fulcrum (Converts force into useful work)

Rube Goldberg machines are complex machines. Identify atleast 3 simple machines found in the RGM in the image.

Tags

NGSS.MS-PS2-1