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Forces - Coggle Diagram
Forces
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pressure
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pressure in liquids
P = ρgh
pressure = height of the column x density of the liquid x gravitational field strength
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momentum and velocity
A moving object has momentum. This is the tendency of the object to keep moving in the same direction.
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p is the momentum in kilograms metres per second, kg m/s
m is the mass in kilograms, kg
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Notice that momentum does not just depend on the object’s mass and speed. Velocity is speed in a particular direction, so the momentum of an object also depends on the direction of travel.
This means that the momentum of an object can change if:the object speeds up or slows down
the object changes direction
Hooke's Law
The extension of a spring is directly proportional to the force applied, provided it's limit of proportionality is not exceeded.
What does this mean?
That the material starts to behave in a non-linear way. The material will no longer continue to deform and be able to return to it's original shape.
(Basically it reaches a point where it stretched too much and just stays all floppy and wonky)
x is the extension (in meters, m)
k is the spring constant (in newtons per meter, N/m)
F is the applied force (in newtons, N)
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Spring constant measures how stiff the spring is. The larger the spring constant is, the stiffer the spring
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