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in Physics by (86.6k points)
A bob of mass `10 kg` is attached to a wire `0.3 m` long. Its breaking stress is `4.8xx10^(7) N//m^(2)`. Then area of cross-section of the wire is `10^(-6) m^(2)`. What is the maximum angular velocity with which it can be rotated in a horizontal circle?
A. `2 "rad"//s`
B. `4 "rad"//s`
C. `6 "rad"//s`
D. `8 "rad"//s`

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1 Answer

0 votes
by (85.9k points)
Correct Answer - B
`mr omega^(2)` = Breaking stress `x A`

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