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1. |
A man whirls a stone of mass 250 gram, tied at the end of a string of length 2 m in a horizontal circle and at a height of 5 m from the ground. The string breaks and the stone flies off tangenitially and strikes the ground at a horizontal distance of 10 m from the man. What was the magnitude of the centripetal acceleration of the stone, when it was moving in the circle? (g = 10 m/s2) |
A. | 50 m/s2 |
B. | 25 m/s2 |
C. | 40 m/s2 |
D. | 30 m/s2 |
Answer» B. 25 m/s2 | |