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Forces - Coggle Diagram
Forces
Destructive forces
Earthquakes
Tsunamis
Volcanoes
Typhoons
Types of forces
Frictional force
Contact force
Produced when one surface rubs against another
Gravitational force
Non-contact force
Attracts objects towards the earth
Measure of force of gravity on an object = weight
Magnetic force
Non-contact force
Magnets attract iron/steel objects
Magnets attract or repel each other
Effects on objects (Start or stop motion, Change speed, Change direction of motion, Change size/shape, Exert pressure)
Speed
Distance travelled per unit time
SI unit: m/s
Speed = Distance travelled / Time taken
Pressure (Pressure= Force/Area) (SI unit: N/m^2 or Pa)
Liquids
Exert a pressure on objects in the liquid, e.g. water in underwater vehicles
Gases
Squashing a drink box when air is being sucked out.
Holding a suction cup on the wall
SI unit: Newton (N)
Measured with spring balances