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P1.5 forces (Selina) (effects of forces (Hooke's law (f=kx (k is the…
P1.5 forces (Selina)
effects of forces
forces can change the shape, size and motion of an object.
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limit of proportional: The limit of proportionality is the is the point beyond which Hooke's law is no longer true when stretching a material.
relationship between resultant force, mass and acceleration.
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turning effect
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when there are no resultant force and no resultant turning effect, a system is in equilibrium.
when the both end of a beam are attracted by the same rate of force they will balance on the pivot, because there will be no resultant force.
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centre of mass
the centre of mass will affect the balance of the beam a lot. the distance between the force and the pivot will be affected by the position of the centre of mass.
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