A bob is whirled in a horizontal circle by means of a string at a uniform speed of

PHYSICS · Numerical · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

A bob is whirled in a horizontal circle by means of a string at a uniform speed of 20 m s−120\,\text{m s}^{-1}. If the tension in the string is quadrupled while the radius remains constant, find the new speed.

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