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ENGG/JEEMED/NEETSign InQuestion on Rotational MotionJoin Now for Exam PreparationSTART YOUR NEET-UG PREPARATION>> More than 1 lakh Students>> Practice 1000s of questions>> Chapter-wise Study Material>> Guided Study PlanWHAT ARE YOU WAITING FOR? JOIN NOWHOME > NEET-UG > PHYSICS > ROTATIONAL MOTIONA cord is wound around the circumference of wheel of radius r. The axis of the wheel is horizontal and moment of inertia about it is I. The weight mg is attached to the end of the cord and falls from rest. After falling through a distance h, the angular velocity of the wheel will be(WHY WOULD WE EQUATE MGH TO ROTATIONAL KINETIC ENERGY)?

Norman Manchu , 6 Years ago
Grade 10
anser 1 Answers
Gaurav Gupta

Last Activity: 6 Years ago

the mass is assumed to be in pure rolling motion. and in pure rolling the work done by friction is zero. so decrese in potential energy= increase in kinetic energy

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