A 5 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 20 N and the radius of the path is 2 m, what is its speed?
Q1. A 5 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 20 N and the radius of the path is 2 m, what is its speed?
Answer: 2√2 m/s
Explanation: Tension = mv² / r, so v² = Tr / m = (20 * 2) / 5 = 8, thus v = √8 = 2√2 m/s.