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

Question

A bob is whirled in a horizontal plane by means of a string with an initial speed of rpm. The tension is the string is T. If speed becomes 2 , while keeping the same radius, the tension in the string becomes [NEET 2024]

Accepted Answer

Correct answer: B. (b) The tension in the string will be equal to centripetal force F_c= mv^2r=m ^2r According to question, T=m ^2r and T^ '=m (2 )^2r T^ 'T= m (4 ^2 )rm ^2r ⇒T^ '=4T

$A bob is whirled in a horizontal plane by means of a string with an initial speed of ω rpm . The tension is the string is T . If speed becomes 2 ω, while keeping the same radius, the tension in the string becomes [NEET 2024]$

Solution

More Friction PYQs