Rotational KE and work

IB Physics: Rotational KE and work

Again applying what students have already covered in linear motion to a particle attached to a light rod leads to an understanding of rotational motion.The rolling ball derivation is straightforward application of conservation of energy but the algebra might look frightening to some. Also possible to do it by considering the torque applied to the ball by friction.Probably worth spending some class time on problem solving...

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