A stone of of mass 0.25 kg tied to the end of a string is whirled round in a circle of radius 1.5 m with a speed of `40 rev//min` in a horizontal plane What is the tension in the string ? What is the maximum speed with which the stone can be whirled around If the string can withstand a maximum tension of 200 N ?

Explanation

To solve the problem step by step, we will first calculate the tension in the string when the stone is whirled around, and then we will find the maximum speed with which the stone can be whirled if the string can withstand a maximum tension of 200 N.

### Step 1: Convert the speed from revolutions per minute to radians per second

Given:
- Speed = 40 revolutions per minute (rev/min)

1 revolution = \(2\pi\) radians, and 1 minute = 60 seconds.
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