Complex Machines

A wheel with a rope used to lift or move heavy objects.

• gear

• inclined plane

• pulley

• screw

Tags

NGSS.MS-PS2-1

The above information states the simple machines found in a complex machine. Which of the following tools is related to the above information?

• Staple

• Wristwatch

• Wheelbarrow

• Hand drill

Tags

NGSS.MS-PS2-1

The video above shows a machine. Why is the invention of this machine is important to humans?

• To improve economy

• To increase food production

• To create job opportunity

• To improve the health of humans

The diagram shows a complex machine. Which of the following simple machines can be found in this complex machine?

• Screw, lever, pulley and wedge

• Gear, lever and wheel and axle

• Screw, pulley, wheel and axle

• Inclined plane, gear and lever

The machines can be divided in two groups:

• simple and difficult machines

• complex and easy machines

• simple and complex machines

• the three options are correct

A complex machine ...

• doesn´t exist.

• is a machine very difficult to create.

• is a machine very difficult to use.

• is the combination of one or more simple machines together.

What type of machines are these?

• Complex machines

• Simple machines

• Normal machines

• The three answers are correct

A washing machine is ...

• A wedge

• A lever

• A complex machine

• A simple machine

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

• Lever

• Pulley

• Bicycle

• Wedge

What is the primary function of gears in complex machines?

• To increase speed

• To change direction

• To transmit torque

• To reduce friction

Tags

NGSS.MS-PS2-1