NCERT Exercise 4.21 - Laws of Motion
Question: A 0.25 kg stone moves in a horizontal circle of radius 1.5 m at 40 rev/min. Find string tension and the maximum speed if the string can withstand 200 N.
Answer: Tension is **about 6.6 N**; maximum speed is **about 34.6 m s^-1**.
Full step-by-step NCERT solution with diagrams on Something by Zero.