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# 7 Forces

### Forces keywords

A force that tries to slow things down that are moving through air. It is a type of friction. air resistance
A force that needs to touch an object before it can affect it (e.g. friction). contact force
Air resistance and water resistance are both sometimes called drag
A push or a pull. force
Piece of equipment containing a spring, used to measure forces. force meter
A force that tries to slow things down when two things rub against each other. friction
The force of attraction between any two objects. gravity
A force that attracts objects made out of iron. magnetism
The unit of force. newton (N)
Another name for a force meter. newton meter
A force that can affect something from a distance (e.g. gravity). non-contact force
How fast something is moving. speed
A force which attracts things with extra electrical charges on them. static electricity
A force that pushes things up. upthrust
A force that tries to slow things down that are moving through water. It is a type of friction. water resistance
The amount of mass that 1 cm3 of a substance has. Measured in g/cm3. density
The volume of water pushed out of the way by an object. displacement
A force that pushes thing up. upthrust
When two forces are the same strength, but working in opposite directions. balanced forces
Any substance that will return to its original shape and size after it has been stretched or squashed. elastic
A unit for measuring mass gram
The amount of matter that something is made of. Measured in grams (g) mass
The unit of force newton
Not moving. stationary
When two forces working in opposite directions are not the same strength. unbalanced forces
The amount of force with which gravity pulls something towards the Earth. It is measured in newtons (N). weight
A substance (normally a liquid) used to reduce friction. lubricant
The distance a car travels while the brakes are trying to stop it. braking distance
A graph that shows how far and how fast something travels during a journey. distance/time graph
The distance a car travels while the driver is deciding to press the brake pedal. thinking distance
Created by: grovebiol