Soru
(g) Find the moment of inertia of a solid circular cylinder of radius a and mass m about an axis on the surface of the cylinder and parallel to the axis of the cylinder. (Given that the moment of inertia of the cylinder about its axis is (1)/(2)Ma^2 )
Çözüm
4.3
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Levent
Uzman · 3 yıl öğretmeni
Uzman doğrulaması
Cevap
To find the moment of inertia of a solid circular cylinder of radius
and mass
about an axis on the surface of the cylinder and parallel to its axis, we use the **parallel axis theorem**.The **parallel axis theorem** states:
where:-
is the moment of inertia about the center of mass (the axis passing through the center of the cylinder),-
is the mass of the object,-
is the perpendicular distance between the two axes.### Step 1: Moment of inertia about the central axisThe moment of inertia of the cylinder about its central axis (through the center of mass) is given as:
### Step 2: Distance between the axesThe axis on the surface of the cylinder is parallel to the central axis and at a distance
(the radius of the cylinder).### Step 3: Apply the parallel axis theoremUsing the parallel axis theorem:
Substitute
and
:
### Final Answer:The moment of inertia of the cylinder about the given axis is: