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1. A 1.2 kg stone is tied to a string and swung in a vertical circle with a radius of 0.75 m. The

string can withstand a tension of 40.0 N.

At what maximum speed can the stone move at the bottom of its path without the string

breaking?

0.95 m/s

4.2 m/s

5.0 m/s

5.7 m/s