Two thin discs, each of mass 
and radius 
m, are attached as shown in Figure, to form a rigid body. The rotional inertia of this body about an axis perpendicular to the plane of disc 
passing through its centre is
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a)
b)
c)
4
d)
and radius m, are attached as shown in Figure, to form a rigid body. The rotional inertia of this body about an axis perpendicular to the plane of disc passing through its centre isa)
b)
c)
4
d)
Question ID - 100368 | SaraNextGen Top Answer Two thin discs, each of mass and radius m, are attached as shown in Figure, to form a rigid body. The rotional inertia of this body about an axis perpendicular to the plane of disc passing through its centre is
a)
b)
c)
4
d)
Two thin discs, each of mass and radius m, are attached as shown in Figure, to form a rigid body. The rotional inertia of this body about an axis perpendicular to the plane of disc passing through its centre is
|
a) |
|
b) |
|
c) |
4 |
d) |
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1 Answer
127 votes
Answer Key / Explanation : (d) -
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(d) Moment of inertia of discs
Now, moment of inertia of disc
So |
and 
about the axis through their centre of mass and perpendicular to the plane will be
about an axis through 
by theorem of parallel axis will be
127 votes
Answer Link
127