# Year 3 Science 23rd June 2021

Hi year 3,

This week we are going to make progress on our knowledge of forces and will look at friction as a force.

What is friction? Watch the video to find out.

https://www.bbc.co.uk/bitesize/clips/z79rkqt

Investigation:

Complete your investigation at home and complete the challenges below:

Bronze: What is friction?

Silver: Which surface have more or less friction? How do you know?

Gold: If I went skiing would I want there to be more or less friction? Explain.

1. #### Mohammed I.

Bronze;
Friction is the force that is difficult for one object that can slide.
Silver
Acarpet will have more friction.

2. #### Aro M.

Bronze: if the car move on a up way more friction if the car moves down it is less friction

Good try Aro.

Friction is a rubbing force. It can make something go faster or slower depending on the force used.if the surface is smooth the friction will be less. If the surface is not smooth the friction will be bigger and more

4. #### Zahraa Y.

Bronze
Friction is when you. Add more force it moves less and If you you add less it would go more
Silver
The carpet could have more because if it was rough I could move more

• #### Miss Millar

Where might you see friction in action during the school day?

5. #### Ramarni J.

Bronze:
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact.
Silver:
Rough surfaces have more friction than smooth surfaces and liquids such as oil or water are sometimes used as lubricants to reduce the effect of friction. There is no mystery behind friction. It acts on objects at the surfaces so as to prevent or reduce movement between the surfaces.
Gold:

The more friction, the more heat you generate instead of speed, and the slower you go down the slope. … Hot wax which is applied to the entire ski, in particular, reduces the friction between the ski and the snow, which means you can go faster down the slope. Wax is a cheap and effective way to improve your speed!

• #### Miss Millar

Where might you see friction in action during the school day?

6. #### Zeyd H.

Bronze
Friction is a force that slows things down.
Silver
The table has less friction because it is more smoother than the carpet.
The carpet has more friction because it is rough.
Gold
Less friction because you will be able to ski longer.

• #### Miss Millar

Where might you see friction in action during the school day?

7. #### Yusuf B.

bronze
friction is a force between two things that work in the opposite ways.

Silver: Which surface have more or less friction? How do you know?
carpet has more friction because it is rough
table -the table has less because it is smooth

• #### Mrs Khaliq

Well done Yusuf. Now answer gold.

• #### Miss Millar

Nice one. Where might you see friction in action in the school day?

8. #### Ahmed B.

Bronze
Friction is a force that can slow stuff down or make them faster.
Silver
The Laminated floor Has less friction because it is more smooth.
Gold
Less because you wanna go faster.

• #### Miss Roberts

How does friction alter speed?

9. #### Caleb A.

gold
you would want both so you dont go to fast and fall over also if you go to small yo mite crash into somone.

• #### Miss Roberts

Can you complete some more challenges? as this is not enough work.

• #### Caleb A.

Bronze
Friction is a force the slows things down.
Silver
A flat smooth surface would have less friction in comparison to a rigid surface.

• #### Miss Millar

Where might you see friction in action during the school day?

10. #### Minaal A.

A friction is some thing connecting slow objects
The carpet is 4secs wooden floor was 3secs the kitchen tyle is 4secs.