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Grade: 11
        
The potential energy of a particle in a certain field has the formU =a/r²-b/r,where  A and B are positive constants, r is the distance from the centre of the field. the value of r0 corresponding to the equilibrium position of the particle (state if it is stable or unstable )is
one year ago

Answers : (1)

Arun
23382 Points
							
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.
one year ago
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