Aregulation table tennis ball has a mass of 2.7g and is 40mm in diameter. what is its moment of inertia about an axis that passes through its center?

Explanation:

The moment of inertia of a sphere about an axis passing through its center is given by:

where

M is the mass of the sphere

R is the radius of the sphere

For the tennis ball in this problem, we have the following data:

Mass: M = 2.7 g = 0.0027 kg

Radius: R = d/2 = 40 mm / 2 = 20 mm = 0.020 m

Therefore, the moment of inertia is

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.