Find the kinetic energy rotating system

Reference no: EM13343132

A student sits on a freely rotating stool holding two dumbels, each of mass of 3.00kg. When the student's arms are extended horizontally, the dumbbells are 1.0m from the axis of rotation and the student rotates with an angular speed of 0.75 rad/s. The rotational inertia of the student and the stool is 3.0 kgm2 and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.30m from the rotational axis.

a. What is the new angular speed of the student?

b. find the kinetic energy rotating system before and after he pulls the dumbbells inward?

Reference no: EM13343132

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