Figure shows a bead of mass m moving with uniform speed v through a U- shaped smooth wire. The wire has a semi-circular bending between A and B. The average force exerted by the bead on the part AB of the wire is -
A
2 mv
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Change in momentum = 2mv
time = 
= 
Average force = 
= 
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