wiz-icon
MyQuestionIcon
MyQuestionIcon
2
You visited us 2 times! Enjoying our articles? Unlock Full Access!
Question

A ceiling fan is rotating with an angular velocity of 4 rev/s. It takes 40 s to stop when it is switched off. The angular retardation during this interval is

A
3π5 rad/s2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
π5 rad/s2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
π5 rad/s2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
2π5 rad/s2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C π5 rad/s2
We know that αavg=ωfωitfti
Given ωi=4 rev/s=4×2π rad/s=8π rad/s
and ωf=0
Retardation, αavg=08π40=π5 rad/s2

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