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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?
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?
no work because it's circular motion right?
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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