1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

# Two identical spherical balls of mass M and radius R each are stuck on two ends of a rod of length 2R and mass M (see figure). The moment of inertia of the system about the axis passing perpendicularly through the centre of the rod is

A
13715MR2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
1715MR2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
20915MR2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
15215MR2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

## The correct option is A 13715MR2For ball, using parallel axes theorem,for ball moment of inertaia, Iball=25MR2+M(2R)2=225MR2 For two balls 2Iball=2×225MR2 For rod Irod=M(2R)212=MR23 Moment of inertia of the system is Isystem=2Iball+Irod 445MR2+MR23=13715MR2

Suggest Corrections
33
Join BYJU'S Learning Program
Related Videos
Moment of Inertia of Solid Bodies
PHYSICS
Watch in App
Explore more
Join BYJU'S Learning Program