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

Only

a

and

b

happen

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Only

b

and

c

happen

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a, b

and

c

happen

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All are true

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Solution

The correct option is C All are true
Kinetic energy is lost from a system of colliding objects because the collision transforms kinetic energy into other forms of energy - sound, heat and light energy. When the colliding objects don't really collide in the usual sense (that is when the collision force is a non-contact force), the system of colliding objects does not lose its kinetic energy and thus kinetic energy is conserved.
Since there is no external force , linear momentum of system will be conserved.
Also, the time of impact in elastic collision is very small and so the colliding bodies experience large force during small interval of time.
Hence all the statements are true.

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Similar questions

Q. Assertion :In an elastic collision of two bodies, the momentum and energy of the system are conserved. Reason: If two bodies stick to each other, after colliding, the collision is said to be perfectly inelastic.

Collision is a physical process in which two or more objects, either particle masses or rigid bodies, experience very high force of interaction for a very small duration. It is not essential for the objects to physically touch each other for collision to occur. Irrespective of the nature of interactive force and the nature of colliding bodies, Newton's second law holds good on the system. Hence, momentum of the system before and after the collision remains conserved if no appreciable external force acts on the system during collision.

The amount of energy loss during collision, if at all, is indeed dependent on the nature of colliding objects. The energy loss is observed to be maximum when objects stick together after collision. The terminology is to define collision as 'elastic' if no energy loss takes place and to define collision as 'plastic' for maximum energy loss. The behaviour of system after collision depends on the position of colliding objects as well. A unidirectional motion of colliding objects before collision can turn into two dimensional after collision if the line joining the centre of mass of the two colliding objects is not parallel to the direction of velocity of each particle before collision. Such type of collision is referred to as oblique collision which may be either two or three dimensional.

Which of the following collision is one-dimensional?

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).

Q. In an elastic collision
(a) the kinetic energy remains constant
(b) the linear momentum remains constant
(c) the final kinetic energy is equal to the initial kinetic energy
(d) the final linear momentum is equal to the initial linear momentum.

Q. Two bodies collide at the same temperature. Which of the following must remain conserved?
(i) Velocity
(ii) Momentum
(iii) Kinetic energy

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

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