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forces - Coggle Diagram
forces
Forces & elasticity
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extension of an elastic object is directally proportional to the force applied - provided the limit of proportionality isn't exceeded
A force stretching (or compressing) a spring does work and elastic potential energy is stored int he spring
If the elastic returns to the original shape , once the force is removed, it is elastic deformation // if it doesn't it is inelastic deformation
provided the spring is not inelastically deformed, the work done will be equal to the elastic potential energy stored
more than one forces has to be applied to cause stretching, bending or compresion because the stationary object would just move
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Compression & Extension are examples of forces involved in stretching, bending, compressing
moments, leavers & gears
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A simple leaver and simple gear system can both be used to transmit the rotational effect of a force
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gravity
The weight of an object depends on the gravitational field strength at the point where the object is
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The weight of an object may be considered to act at a single point reffered to as the object's centre of mass
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weigth is directly proportional to the mass of an object // measured using a newton meter (a calibrated spring)
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scalar & vector
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vector quantities are represented with an arrow, the length represents the magnitude and the directionr epresents the direction
forces & motion
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Newton's laws of motion
2nd: "The acceleration of an object is proportional to the resultant force acting on the object, and inversely proportional to the mass of the object" = F=m x a
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1st: "Every object stays at rest, or continues in uniform motion, unless a resultant force acts on it"
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resultant forces
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A number of forces acting on an object may be replaced by a single force that has the same effect as the original forces acting on it
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