wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A block of mass m at the end of a string is whirled round in a vertical circle of radius r. The critical speed of the block at the top of its swing below which the string would slacken before block reaches the top is

A
2rg
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
3rg
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
rg
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
5rg
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C rg
the string will not slack if the centrifugal force on the particle is greater then or equal to the weight of mass i.e.
mv2rmgvrgvc=rg

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