Answer:
a)
, b) 
Explanation:
a) The turntable has the following physical model by using Newton's laws:

The moment of inertia is:



b) The moment of inertia for a solid cylinder:

The mass of the turntable is:



The momentum does not change because he is going the same speed just a different way.
First solve the potential energy of the biker. using the fomula:
PE = mgh
where m is the mass of the object
g is the acceleration due to gravity ( 9.81 m/s2)
h is the height
PE = 96 kg ( 1120 m ) ( 9.81 m/s2)
PE = 1054771.2 J
then power = Work / time
P = 1054771.2 J / ( 120 min ) ( 60 s / 1 min)
P = 146.5 W
because speed can change overtime for a car, and isn't always constant.
I believe the correct answer from the choices listed above is the first option. <span>A blimp flying around over the Super Bowl has both kinetic and potential energy. It initially posses potential energy then as it moves te said energy is converted to kinetic energy. Hope this answers the question.
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