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    A boy whirls a 30g conker around his head in a circle at a speed of 2.2ms−1, using a taut inextensible string. How much work is done on the conker by the tension in the string?
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    (Original post by Rosy monaghan)
    A boy whirls a 30g conker around his head in a circle at a speed of 2.2ms−1, using a taut inextensible string. How much work is done on the conker by the tension in the string?
    Not enough information to answer.

    What is the radius?
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    no work because it's circular motion right?
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    (Original post by DrSebWilkes)
    no work because it's circular motion right?
    Yeah, I was over-thinking the real-life situation with translational motion of the boys arm etc.
 
 
 
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