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    Question

    A space s t r i n g space b r e a k s space i f space i t s space t e n s i o n space e x c e e d s space 10 space n e w t o n s. space A space s t o n e space o f space m a s s space 250 space g m space t i e d space t o space t h i s space s t r i n g space o f space l e n g t h space 10 space c m i s space r o t a t e d space i n space a space h o r i z o n t a l space c i r c l e. space T h e space m a x i m u m space a n g u l a r space v e l o c i t y space o f space r o t a t i o n space c a n space b e space

    1. 40 space r a d divided by s
    2. 20 space r a d divided by s
    3. 100 space r a d divided by s
    4. 200 space r a d divided by s 200 rad/s

    The correct answer is: 20 space r a d divided by s

      R divided by g not stretchy rightwards double arrow square root of R g end root not stretchy rightwards double arrow fraction numerator m v squared over denominator R end fraction equals m g

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