CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

A disc of mass 2 kg and radius 0.2 m is rotating with angular velocity 30 rad/s. What is angular velocity, if a mass of 0.25 kg is put on the periphery of the disc?

A
24 rad/s
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
36 rad/s
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
15 rad/s
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
26 rad/s
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A 24 rad/s
Let the final angular velocity be w.
Applying conservation of angular momentum : Lf=Li
Or (MdiscR22w)+MparticleR2w=(MdiscR22)wi+0
Or 2×0.222×w+0.25×0.22×w=(2×0.222)×30
w=24 rad/s

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon