A physics professor stands at the centre of a frictionless turntable with arms outstretched and a 4.25 kg dumbbell in each hand as shown in the following figure. He is set rotating about the vertical...

Extracted text: A physics professor stands at the centre of a frictionless turntable with arms outstretched and a 4.25 kg dumbbell in each hand as shown in the following figure. He is set rotating about the vertical axis at 2.95 revolution per second. Find his final angular velocity if he pulls the dumbbells into his stomach. His moment of inertia (without the dumbbells) is 3.7 kgm? with arms outstretched and 2.2 kgm? with his hands at his stomach. The dumbbells are 1.1 m from the axis initially and 0.1 m at the end. Dumbbell Dumbbell Professor (not a dumbbell) W2 BEFORE AFTER Insert the final angular velocity in revolutions per second correct up to at least a third decimal place.