STANDARD Physics Circular Motion MCQ Question
A stone of mass 5 kg is tied to a string of length 10 m and is whirled round in a horizontal circle. What is the maximum speed with which the stone can be whirled around if the string can withstand a maximum tension of 200 N?
10 m s⁻¹
15 m s⁻¹
20 m s⁻¹
25 m s⁻¹
Correct Answer
Detailed Explanation
The maximum speed is given by v_max = √(T_max × r / m). Substituting the values, v_max = √(200 N × 10 m / 5 kg) = 20 m s⁻¹.
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