A small but heavy block of mass `10 kg` is attached to a wire `0.3 m` long. Its breaking stress is `4.8 xx 10^(7) N//m^(2)`. The area of the cross section of the wire is `10^(-6) m^(2)`. The maximum angular velocity with which the block can be rotated in the horizontal circle isA. `4rad//s`B. `8rad//s`C. `10rad//s`D. `32rad//s`

A small but heavy block of mass `10 kg` is attached to a wire `0.3 m`

1.	A small but heavy block of mass `10 kg` is attached to a wire `0.3 m` long. Its breaking stress is `4.8 xx 10^(7) N//m^(2)`. The area of the cross section of the wire is `10^(-6) m^(2)`. The maximum angular velocity with which the block can be rotated in the horizontal circle isA. `4rad//s`B. `8rad//s`C. `10rad//s`D. `32rad//s`
Answer» Correct Answer - A `mromega^(2)=` Breaking stress `xx` cross sectional area `=10xx0.3omega^(2)=4.8xx10^(7)xx10^(-6)=48` or `omega^(2)=48/3=16` or `omega=4rad//s`

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