A 3 kg object is attached to a string and is moving in a circular path on a frictionless surface. If the tension in the string is 15 N and the radius of the path is 2 m, what is its speed?
Q1. A 3 kg object is attached to a string and is moving in a circular path on a frictionless surface. If the tension in the string is 15 N and the radius of the path is 2 m, what is its speed?
Answer: √(15 * 2 / 3) m/s
Explanation: Tension = mv² / r, so v² = Tr / m = (15 * 2) / 3, thus v = √(15 * 2 / 3) m/s.