Q1 to 5 Questions w does momentum before an inelastic collision compare to the m

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Questions w does momentum before an inelastic collision compare to the momentum after the collisi w does momentum before an elastic collision compare to the momentum after the col on? . How doe w does kinetic energy before an inelastic collision compare to the kinetic energy 4. How does kinetic energy before an elastic collision compare to the kinetic energy after the collision? 5. Two bodies und ergo a perfectly inelastic head-on collision. One with mass m, moves with a velocity va Another has a mass m and moves with a velocity vg. What is their velocity after the collision? 103

Explanation / Answer

Solution:

1) As according to the law of conservation of momentum " for an isolated system total momentum is conserved so whether it is elastic or inelastic collsion the momentum should be conserved i.e it should remain constant. In inelastic collision momentum reamins same( final momentum = initial momentum).

2) As the reason stated In 1st point Hence , In elastic collsion momentum reamins constant. ( final momentum = initial momenutm).

3) In case of inelastic collsion there is some loss of K.E so we can say final K.E is not equal to initial K.E Hence there is some change in K.E.

Change in K.E = final K.E = inital K.E

4) In case of elastic collsion there is no loss of K.E so we can say final K.E is equal to initial K.E.

5) Perfectly inelastic collsion is the collsion in which two objects collide and reamains together. final velocity is given by

vf = [ m1 v1i + m2 v2i ] / (m1 + m2)

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