Question :
A stone attached to a rope of length l = 80 cm is rotated with a speed of 240 r.p.m. At the moment when the velocity is directed vertically upwards, the rope breaks. To what height does the stone rise further?
1. 1.2 m
2. 20.6 m
3. 24.9 m
4. 41.2 m
Answer :
2 - 20.6 m
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