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प्रश्न
A mass attached to one end of a string crosses top-most point on a vertical circle with critical speed. Its centripetal acceleration when string becomes horizontal will be ______. (g = gravitational acceleration)
पर्याय
g
3g
4g
6g
MCQ
रिकाम्या जागा भरा
उत्तर
A mass attached to one end of a string crosses top-most point on a vertical circle with critical speed. Its centripetal acceleration when string becomes horizontal will be 3g. (g = gravitational acceleration)
Explanation:
Speed at top most point, v = `sqrt(3"rg")`
Centripetal acceleration, ac = `"v"^2/"r"=(3"rg")/"r"=3"g"`
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