A stone is tied to a string and rotated in a vertical circle. At the lowest point, the tension is 30 N. If the mass is 1 kg, find its speed.
Q1. A stone is tied to a string and rotated in a vertical circle. At the lowest point, the tension is 30 N. If the mass is 1 kg, find its speed.
Answer: √20 m/s
Explanation: At the lowest point, T - m * g = (m * v²) / r. So, v = √((T - m * g) * r / m) = √((30 - 10) * r / 1). Assuming r = 1 m, v = √20 m/s.