Force Flashcards
Pressure is
How much force is put on an area
Force is
Is something that causes an object to move
Pressure is measured in
N/cm*2
Force is measured in
Neutons
Area is measured in
Centimetres
Atmospheric pressure is
Pressure due to weight of air pressing down on the earth. The higher u go above sea level, the less atmospheric pressure there is
What can you measure atmospheric pressure with?
A barometer
What measures the height above sea level?
Altimeter
High pressure (weather)
Fine weather
No clouds
Summers are nice
Winters have bright days
Low pressure (weather)
Windy
Cloudy
Unsettled - lots of rain
Velocity
Speed in a particular direction
Friction
Is a force which prevents easy movement between 2 objects in contact
Disadvantages of friction
- slows things down
- wastes energy
- a lot of unwanted heat and sound is produced
Advantages of friction
Used to stop/slow things down
Allows us to walk and not slip
How to reduce friction
Lubricate with oil or gas