A bead of mass m is located on a parabolic wire with its axis vertical and vertex directed towards downward as in figure and whose equation is x 2 = ay. If the coefficient of friction is µ, the highest distance above the x-axis at which the particle will be in equilibrium is –
A
µa
B
µ 2 a
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
For the sliding not to occur when tan θ ≤ µ
tan θ = 
= 
= 
= 
≤ µ or y ≤ 
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