# Forces and motion

forces and motion

# Forces and motion

Created 2 years ago

Duration 0:02:47
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Slide Content

4. ### Slide 4 - Forces

• Remember, there are 4 main forces you need to know
5. ### Slide 5 - Forces Write this note into your book

• Forces change an objects motion.
• When a force is applied to an object, the object will change direction or speed. We describe this as the forces being unbalanced
• If the forces are BALANCED, they cancel each other out, and the object will not change speed or direction
6. ### Slide 6 - Friction/Drag Write this into your book

• Friction occurs when two objects rub together and acts to stop a force.
• Drag is friction cause by gases (like the air) or liquid (like water in a swimming pool)
• Both friction and drag act to slow you down.
• But they can also be helpful – friction helps to keep a cars tyres on the road

9. ### Slide 9 - Size matters

• You need to be careful when drawing the force arrows on diagrams
• The size of the arrows indicates the size of the force
10. ### Slide 10 - Next steps

• You should have already completed page 100 and 101 in your Scipad, if you haven’t, do this now
• Then complete page 102 and 103
• All done – you can either check out the revision questions on page 122 and 123, or look through some of the links on the ultranet page