Two spheres A and B of masses m1 and m2 respectively collide. A is at re...
Two
spheres A and B of masses m1 and m2 respectively collide. A is at rest
initially and B is moving with velocity v along x-axis. After collision B has a
velocity V/2 in a direction perpendicular to the original direction. The mass
A moves after collision in the direction
AIPMT/NEET
2012 | W.P.E Q 3 | There will be no effect of
vertical motion in case of collision since its an impulsive event. In other
words which means the basic funda of collision and its formula will be
applicable here. that I told you earlier in qus
of year 2010 & 2011. If you haven’t subscribed my channel then do it
now and don’t miss any important thing about Neet. In first sight, it may
appear a tough qus but look carefully no dimensions regarding size is mentioned
here. Only particle word is used which means no need of L.O.C or Funda of
oblique collision. Overall it’s a good qus which plays on your pre knowledge of
oblique collision and can make many of you to think in a complicated way.
In case of collision the two bodies of masses m1 and m2 are moving along
a line with velocities u1 and u2 respectively, u1 should be greater then u2 for
two bodies to collide.
As the
velocity of m1 (u1) is greater than that of m2 (u2), there will be a
deformation in the bodies. This deformation continues till they acquire same
velocity. Now a question arises, that why will they acquire same velocity. The
velocity of the front body m2 (which was slower
initially) will gradually increase, and the velocity of the rear body m1 (which
was faster initially) will gradually decrease. By conservation momentum.
m1u1 + m2u2 = m1 v1+ m2 v2
During the whole process, the momentum of the two
-block system remains constant.
Before and after collision kinetic energy may be
same but not during the whole process.
Newton
This is an experimental law which relates the velocity of approach of the
bodies before collision and the velocity of separation after the impact.
When the collision is neither perfectly elastic nor perfectly inelastic, for
such cases, Newton did certain experiments and
gave another law which is now called as Newton
(a)
Relative
velocity of impact = e [Relative velocity of approach before impact]
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