A small block of mass ‘m’ is rigidly attached at point P to a ring of mass ‘3m’ and radius ‘r’. System is released from rest when radius vector makes an angle of 900 with the vertical (as shown) and rolls without sliding. Angular acceleration just after its release is g/pr, where p = _____ (g is acceleration due to gravity)

(mg−f)r=(3mr2+mr2)α……(1)f =4ma --- (2)Solving α=g8r

Book Online Demo

Check Your IQ

Try Test

Courses

Offline Centres

A small block of mass ‘m’ is rigidly attached at point P to a ring of mass ‘3m’ and radius ‘r’. System is released from rest when radius vector makes an angle of 90⁰ with the vertical (as shown) and rolls without sliding. Angular acceleration just after its release is g/pr, where p = _____ (g is acceleration due to gravity)

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

answer is 8.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

$(m g - f) r = (3 m r^{2} + m r^{2}) α$ ……(1)

f =4ma --- (2)

Solving $α = \frac{g}{8 r}$

Watch 3-min video & get full concept clarity

JEE

NEET

Foundation JEE

Foundation NEET

CBSE