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

# A thin rod of length l and mass m has a disc attached to one of its ends such that the rod and disc are coplanar. Mass of the disc is M and radius r. The distance of COM of the system from the centre of the disc is :

A
Ml2(m+M)
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
B
Ml(M+m)
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
C
mlm+M
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
D
ml2(M+m)
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

## The correct option is D ml2(M+m)In the question we have to find the centre of mass of the system from the centre of the discDistance of Centre of Mass of the rod from the centre of the disc:l2Distance of centre of mass of the disc from reference point :0According to the formula of centre of mass :COM=∑i=ki=1miximi = M∗0+m∗l2M+m = (mM+m)∗l2

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
Work Energy and Power
PHYSICS
Watch in App
Explore more
Join BYJU'S Learning Program