Falling Behind in Studies? Join Our Performance Improvement Batch. Enroll For Free
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-1023-196
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
A point mass m moving with velocity u towards the centre of the disc collides with a disc of mass m and radius r resting on a rough horizontal surface. Its collision is perfectly inelastic. Find angular velocity of system after pure rolling starts. A) 2u/7r B) 7u/2r C) 5u/2r D) 2u/5r
initial linear momentum = mu. final velocity =v and pure rolloing angular velocity=w. let total linear impulse = J, total angular impulse = Jr. linear/angular impulse = change in linear/angular momentum J=mu-2mv Jr= mwr2/2 = mvr/2 J=mv/2= mu-2mv,implies v=2u/5,implies w=2u/5r
initial linear momentum = mu. final velocity =v and pure rolloing angular velocity=w.
let total linear impulse = J, total angular impulse = Jr. linear/angular impulse = change in linear/angular momentum
J=mu-2mv
Jr= mwr2/2 = mvr/2
J=mv/2= mu-2mv,implies v=2u/5,implies w=2u/5r
Post Question
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -