Simple Machines and Complex Machines

Which of the following simple machines comprises a V-shaped metal piece with a sharp edge?

• Wheel and axle

• Gear

• Wedge

• Lever

What is the meaning of complex machines? Machine that

• is difficult to use.

• combination of more than one simple machine.

• is very expensive

• has lots of usage.

Which of the following is not the advantage of machines?

• Help to increase air pollution

• Help to travel

• Help to know the time

• Help to move heavy objects

Which of the following simple machines can be used to cut objects ?

• Wedge

• gear

• Pulley

• Inclined plane

Diagram shows a man lifting an object onto a platform.

• A screw

• A gear

• A pulley

• A lever

Which of the following does not involve the use of technology ?

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Which of the following statements best describes a complex machine?

• It is made up of two or more levers.

• It is made up of several simple machines.

• It consists of many moving parts.

• It can do many things at the same time.

Which of the following activities requires both the simple machine below?

Lever and Wedge

• Opening can with a spoon

• Sweeping the floor

• Lifting a heavy object

• Cutting paper with scissors

What are the similar simple machines that are used in an egg beater and a wrist watch?

• Gears, wheel and axle

• Lever, wheel and axle

• Wedge, wheel and axle

• Tuas, baji dan takal

Diagram shows the use of a simple machine.

Which of the following activities involves the use of the principle of a simple machine which is the same as the one shown ?

• Raising a flag

• Pushing a wheelbarrow

• Sharpening a pencil

• Climbing stairs