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When two bodies collide elastically, the...

When two bodies collide elastically, then

A

Kinetic energy of the system alone is conserved throughout the collision

B

Only momentum is conserved throughout the collision

C

Both kinetic energy and momentum are conserved throughout the collision

D

Neither kinetic energy nor momentum is conserved throughout the collision

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • When two bodies collide elastically, the force of interaction between them is

    A
    conservative
    B
    non-conservative
    C
    either conservative or non-conservative
    D
    zero

  • When two bodies collide elastic, then:

    A
    `KE` of the system along is conserved
    B
    only momentum is conserved
    C
    both `KE` and momentum are conserved
    D
    neither `KE` nor momentum is conserved

  • Comprehension # 2 When two bodies collide normally they exert equal and opposite impulses on each other. Impulse = change in linear momentum. Coefficient of restitution between two bodies is given by :- e = |"Relative velocity of separation"|/|"Relative velocity of approach"| = 1 , for elastic collision Two bodies collide as shown in figure. During collision they exert impulse of magnitude J on each other. If the collision is elastic, the value of J is ............. N-s :-

    A
    `10//3`
    B
    `5//4`
    C
    `8//3`
    D
    `3//2`

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    Comprehension # 2 When two bodies collide normally they exert equal and opposite impulses on each other. Impulse = change in linear momentum. Coefficient of restitution between two bodies is given by :- e = |"Relative velocity of separation"|/|"Relative velocity of approach"| = 1 , for elastic collision Two bodies collide as shown in figure. During collision they exert impulse of magnitude J on each other. For what value of J (in N-s ) the 2 kg block will change its direction of velocity :-

    When two bodies of equal masses collide elastically then

    The force of action and reaction can occur only when two bodies collide against one another.the statememnt is

    Two particles of mass m and 2 m moving in opposite directions collide elastically with velocities v and 2v. Find their velocities after collision.

    Assertion : When two real bodies collide then K.E of the system first decreases and then increases . Reason : At the time collision bodies are first deformed and then due to elasticity bodies try to reform again.

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