A rigid body of total mass has a known rotational inertia about an axis that passes…

PHYSICS · Single correct · A Level · Physics · Engineering physics · Engineering physics

Problem

A rigid body of total mass

M

has a known rotational inertia

I_{cm}

about an axis that passes through its center of mass. Which expression gives the rotational inertia

I'

of the body about a second axis that is parallel to the first and a distance

d

away? (a)

I' = I_{cm} - Md^{2}

(b)

I' = I_{cm} + 2Md^{2}

(c)

I' = I_{cm} + Md^{2}

(d)

I' = Md^{2}