A U-shaped smooth wire has a semicircular bending between A and B as shown in the figure. A bead of mass m moving with uniform speed v through the wire enters the semicircular bend at A and leaves at B. The average force, exerted by the bead on the part AB of the wire is –
A
0
B
C
D
None of these
Text Solution
Verified by ExpertsThe correct answer is:
B
Change in momentum of bead,
p = 2mv and time to cover the half cycle,
t = 
= 
= 
F = 
= 
= 
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