vikas askiitian expert
Last Activity: 13 Years ago
if there is friction bw surfaces of two sphere then due to some frictional torque both sphere will loose some of its rotational KE in the form of heat .... it is given that collision is elastic so there is no change in rotational KE of both particles ...
angular velocity of each body is conserved ....
but for center of mass of both spheres velocity will become diffenrnt ...
from conservation of momentam
mv = mv1 + mv2
v1 + v2 = v ...................1
from conservation of KE
mv2 = mv12 + mv22 .................2
on solving these two eqns
v1 = 0 , v2 = v
these parameters are just after collision....
body dosent move continiously with angular velocity , its linear velocity starts increasing
& angular velocity decreases upto the instant when body starts pure rolling(v = wr) ....