A ball of mass 200 g is whirled in a circle at the end of a string 100 cm long whose breaking strength is 10 N. Neglecting gravity, the maximum speed of the ball is approximately
A) 2 m/s.
B) 7 m/s.
C) 10 m/s.
D) 50 m/s.

Question

Quizplus · Accepted Answer

The maximum tension the string can handle is 10 N. Using the formula for centripetal force, $ F = \frac{mv^2}{r} $, where $ m = 0.2 $ kg, $ r = 1 $ m, and $ F = 10 $ N, we solve for $ v $: $ 10 = \frac{0.2v^2}{1} $, giving $ v^2 = 50 $, so $ v \approx 7 $ m/s.

A Ball of Mass 200 G Is Whirled in a Circle