Science Year 6 Friction Part 2

Which of the following is NOT a way to reduce friction?

• Use rollers or wheels

• Spray the surface with oil or grease

• Use boric acid powder when play carrom

• Use magnesium chalk powder to lift the metal barbell

Picture above showed a pair walking shoe. Why does the shoe designated to have such a pattern foot wear?

• To look cool and beauty

• To increase the friction between footwear's surface and other surface.

• To decrease the friction between footwear's surface and other surface.

• To make in durable and strong

Picture showed an ice skating shoe. Why is the shoe designed and made like this?

• To increase friction between ice surface and shoe.

• To decrease friction between ice surface and shoe

• To make it strong and durable

• To cut the ice during skating.

What is the advantages of friction?

• Worn out the shoe's foot

• Make bathroom's floor slippery

• Allows us holding things

• Produces unwanted noise

Ways to reduce frictional force

(Tick more than 1 answer)

• Use lubricants

• Use grease

• Use magnesium carbonate chalk powder

• Use rollers and ball bearings

The frictional force_________________ caused the boy to fall.

• decrease

• increase

What does friction produce?

• light
• sound
• heat
• gravity

Tags

NGSS.4-PS3-2

Which of the following is the disadvantages of frictional force?

(Tick more than 1 answer)

• Produces heat in the engine compartment

• Worn out the surfaces of tyre

• Allows us to walk without slipping

• Can sharpen a knife

What is the function of the rollers?

• To avoid the object from broken

• To reduce friction

• To slow down the movement of the object

The diagram shows a roller bearing that can be found in the bicycle. What is the function of roller bearing?

• Increase the frictional force

• Decrease the frictional force