You are designing a rotating metal flywheel that will be used to store energy. the flywheel is to be a uniform disk with radius 23.0 cm. starting from rest at t = 0, the flywheel rotates with constant angular acceleration 3.00 rad/s2 about an axis perpendicular to the flywheel at its center. if the flywheel has a density (mass per unit volume) of 8600 kg/m3, what thickness must it have to store 800 j of kinetic energy at t = 8.00 s?

We have that for the Question, it can be said that  thickness must it have to store 800 J of kinetic energy at t = 8.00 s

h=0.0735m

From the question we are told

Generally the equation for the   is mathematically given as

Therefore

h=0.0735m

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t = 0.0735 m

Explanation:

Angular acceleration of the flywheel is given as

now after t = 8 s the speed of the flywheel is given as

now rotational kinetic energy of the wheel is given as

now we have

your answer is c! hope this : )

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000