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Hooke’s law
Fs = -kx
k in Hooke’s law
Spring constant
x in Hooke’s law
Distance a spring is stretched or compressed from equilibrium
Spring constant
Strength of spring
Units for spring constant
N/m
Why Hooke’s constant has a negative sign
Springs push in the opposite direction of their stretch
Spring force in mechanical scales
Mechanical scales have a set of springs that compress or stretch as you step on it
Equation for spring energy
U = (½)kx2