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Law of Conservation of Energy

5.In oblique ...

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5.In oblique collision WHY linear momentum remains conserved in perpendicular direction of the line 'joining their center of mass' ?

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Q. During one dimensional collision or head on collision :

a) The bodies move along the line joining their centre of mass before and after collision.
b) The bodies should move in opposite direction.
c) The bodies change their direction after collision.
d) The bodies move along the line joining their centre of mass before and after collision either in same direction or in opposite direction.

Q. The total kinetic energy in an elastic collision is conserved even during the collision
Total linear momentum is conserved in an elastic collision.

Q. Assertion (A) : When a particle of certain mass collides with identical particle at rest, the two particles move,after perfectly elastic collision, in a mutually perpendicular direction, if it were not a head-on collision.
Reason (R) : Both momentum and KE are conserved in the case of perfectly elastic collision.

Q. Assertion :Linear momentum is conserved in both, elastic and inelastic collisions. Reason: Total energy is conserved in all such collisions.

Q. Assertion :Two particles moving in the same direction do not lose all their energy in a completely inelastic collision Reason: Principle of conservation of momentum holds true for all kinds of collision

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