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.

153 Comments

  1. 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

  2. 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

  3. 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!

  4. 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.

  5. 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

  6. 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.

  7. Friction is a force between two surfaces that are sliding, or trying to slide, across each other. … Friction always works in the direction opposite to the direction in which the object is moving or trying to move. Friction always slows a moving object down.
    silver
    rough more
    soft less

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