Science Revision

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  • Created by: Ava21
  • Created on: 30-11-17 20:14
What is an Unbalanced Force?
An unbalanced force is a force with an unequal pull and push which means that it may begin to move in a certain direction depending on the strength of the push/pull
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What is a balanced Force?
A balanced force is a force that it has an equal pull and push so stays in one certain spot.
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Speed =
Distance / Time
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Distance =
Speed x Time
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Time =
Distance / Speed
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What is friction?
Friction is the force that opposes movement
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When is friction helpful?
The grip for climbers and between your shoes and the road to prevent slipping
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When is friction a nuisance?
roller skates need to be replaced often because they wear away because of friction and car engine parts and bike parts wear away for the same reason
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How can you reduce friction?
You can use materials such as teflon (non stick) or waxes or polishes. You can also use a lubricant like oil or grease for moving parts.
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What can Air resistance do?
slows down parachutists
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Weight =
Mass x Pull of gravity
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What is the pull of gravity on earth?
10N/Kg
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Mass is a ...
measure of the amount of matter in a substance or object.
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Weight is a ...
Force
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What is weight measured in?
Newtons
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What can forces do?
-Change the speed of an object -Change the direction of movement of an object -Change the size or shape of an object
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What are the examples of forces?
Weight, Tention, Resistance, Frictional, Contact, Electrical and Magnetic
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What are the states of Matter?
Solid, liquid and Gas
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Describe a solid.
-Regular patterns -Very close together -Tight -Not able to change -Vibrate - Keeps shape until broken -Same volume
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Describe a liquid.
-Not regular -Not as tightly held like solids -Particles flow and change places -Change shape -Same volume
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Describe a gas.
-Far apart -Not arranged -Weak forces -Move random quickly -Gases flow -Spread out as far as possible -Change volume and shape
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Other cards in this set

Card 2

Front

What is a balanced Force?

Back

A balanced force is a force that it has an equal pull and push so stays in one certain spot.

Card 3

Front

Speed =

Back

Preview of the front of card 3

Card 4

Front

Distance =

Back

Preview of the front of card 4

Card 5

Front

Time =

Back

Preview of the front of card 5
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