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Forces - Coggle Diagram
Forces
Introduction to Forces
A force is a push or pull or lift (rarely tested)
Effects of forces
cause a stationary object to start moving
cause an object to stop moving
change the speed of a moving object
change the direction of a moving object
change the shape and size of an object
forces only exist due to interactions
forces have a size (magnitude) and a direction
measured in Newtons
cannot be seen but effects are felt
balanced and unbalanced forces (
not commonly tested
)
Newton's third law: for every action, there is an equal and opposite reaction. When forces are balanced, there is no change in motion.
types of forces
Air resistance
frictional force that opposes the motion of an object through air
affected by the amount of surface area of the object exposed to air
contact force
Friction
force between two surfaces that opposes motion
can cause wear and tear
contact force
Magnetic force
attraction or repulsion force exerted by a magnet onto a magnetic material or another magnet
non contact force
poles of a magnet exert greatest magnetic force while middle part exerts weakest magnetic force
Gravitational force
attraction between any two objects with mass
only a pulling force
non contact force
constant at all heights ; affected by mass and distance
Elastic spring force
force that is exerted by a spring to return to its original length of shape when stretched or compressed
when stretched: pulling force at both ends
when compressed: pushing force at both ends