A stone is tied to a string and rotated in a vertical circle. At the top, its speed is 5 m/s. If the radius is 1.5 m, what is the tension?
Q1. A stone is tied to a string and rotated in a vertical circle. At the top, its speed is 5 m/s. If the radius is 1.5 m, what is the tension?
Answer: 0 N
Explanation: Tension = (m * v²) / r - m * g. At top, if v = √(g*r), then T = 0. Here, v = 5, √(g*r) = √(10*1.5) = √15 = 3.87, so T = 0.