Question

A stone of mass $1 \, kg$ is tied to end of a massless string of length $1 m$ If the breaking tension of the string is $400\, N$, then maximum linear velocity, the stone can have without breaking the string, while rotating in horizontal plane, is :

• A. $40 \,ms ^{-1}$
• B. $20\, ms ^{-1}$
• C. $400\, ms ^{-1}$
• D. $10 \,ms ^{-1}$

Answer 1

Answer: (B)

$20\, ms ^{-1}$

Answer 2

The correct answer is (B) : $20\ ms^{-1}$