A bob is whirled in a horizontal plane by means of a string with an initial speed of ω rpm. The tension in the string is T . If speed becomes 2 ω while keeping the same radius, the tension in the string becomes:

Correct answer: A. 4T T=m ω^2 aligned & T^ =m (2 ω)^2 & T^ =4 T aligned

NEET 2024

Exam: NEET
Year: 2024
Subject: Physics
Chapter: Motion in Two Dimensions

NEET 2024 · Physics · Motion in Two Dimensions

A bob is whirled in a horizontal plane by means of a string with an...

A bob is whirled in a horizontal plane by means of a string with an initial speed of

\omega

rpm. The tension in the string is

T

. If speed becomes

2 \omega

while keeping the same radius, the tension in the string becomes: A bob is whirled in a horizontal plane by means of a string with an initial speed of ω rpm. The tension in the string

A bob is whirled in a horizontal plane by means of a string with an initial speed of ω rpm. The tension in the string

Options

A4T
BT/4
C $\sqrt{2} T$
DT

Correct answer

A. 4T

Step-by-step solution

T=m \ell \omega^2

\begin{aligned} & T^{\prime}=m \ell(2 \omega)^2 \\ & T^{\prime}=4 T\end{aligned}

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