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FORCE, causes pressure - Coggle Diagram
FORCE
Effect of Forces
stop a moving object
change direction of a moving object
move a stationery object
change the speed of a moving object
cause turning effect
change the shape and size of object
leads to
WORK DONE
work is done only when
condition no.2:the object is moving in the same direction
condition no.1:force is applied on the object
Formula:force/surface area of contact. Unit Pa oe N/m2
Pressure increases when the force increases or when the area of contact decreases
contact force
Friction
uses:
allow us to grip things tigthly
allow us to light a match stick
allow us to write on paper
allow us to stand stably
definition:force that opposes the motion between two surfaces in contact
it is a nuisance when:
causes wear and tear
causes movement to be diffcult
elastic force
definition:force acting on a stretched or compressed elastic object to return to its orginial shape
examples:rubber band,bow
Defintion
Push and Pull
non contact force
examples
magnetic force
definition:force exerted between a magnet and another magnetic material
examples:refrigerator door,maglev train
Gravitational force
Definition:force that attracts two objects towards each other
effects:
gives objects weight
allow us to stand on ground with floating
responsible for the motion of planets in Solar System
causes tides in ocean
difference between mass and weight
difference 1:mass is measured with electronic balance but weight is measured using spring balance
difference 2:SI unit of mass is kilogram but SI unit of weight is Newton
difference 3:mass remains constant but weight changes with the change of location due to the different gravitational forces.
SI Unit: Newton
causes pressure