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The potential energy of a particle in a certain field has the form U=a/r^2 - b/r,where a and b are positive constants.r is the distance from center of the field. Find the value of (r0) corresponding to the equilibrium position of particle and examine whether this position is steady.
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for equilibrium dU/ dr = 0
-2A/r³ + B/r² = 0 r = 2A / B
for stable equilibrium d²U /dr² should be positive for the value of r.
here d²U / dr² = 6A/r⁴ – 2B/r³ is +ve value for r = 2A / B So.
-2A/r³ + B/r² = 0 r = 2A / B
for stable equilibrium d²U /dr² should be positive for the value of r.
here d²U / dr² = 6A/r⁴ – 2B/r³ is +ve value for r = 2A / B So.
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