Identify which of the following quantities remain conserved during an elastic collision?

momentum only

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momentum and potential energy

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kinetic energy only

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momentum and kinetic energy

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momentum end velocity

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Solution

The correct option is D momentum and kinetic energy
During collision, net external force acting on the colliding bodies is zero, thus total momentum of the system is conserved in all types of collision.
But total kinetic energy of the system is conserved only in case of elastic collision.
Hence option D is correct.

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Similar questions

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. During elastic collision which of the following things happens ?
a) The colliding bodies experience large force during small interval of time
b) The colliding bodies need not touch each other
c) The kinetic energy remain conserved
d) The linear momentum remain conserved

Answer carefully, with reasons:

(a) In an elastic collision of two billiard balls, is the total kinetic energy conserved during the short time of collision of the balls (i.e. when they are in contact)?

(b) Is the total linear momentum conserved during the short time of an elastic collision of two balls?

(d) If the potential energy of two billiard balls depends only on the separation distance between their centres, is the collision elastic or inelastic? (Note, we are talking here of potential energy corresponding to the force during collision, not gravitational potential energy).

Answer carefully, with reasons :

(a) In an elastic collision of two billiard balls, is the total kinetic energy conserved during the short time of collision of the balls (i.e. when they are in contact) ?

(b) Is the total linear momentum conserved during the short time of an elastic collision of two balls ?

Q. A particle moving with kinetic energy

K

makes a head on elastic collision with an identical particle at rest. Find the maximum elastic potential energy of the system during collision.

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