Body A of mass 4m moving with speed u collides with another body B of mass 2m at rest. The collision is head-on and elastic in nature. After the collision, the fraction of energy lost by the colliding body A is:

1. 59

2. 19

3. 89

4. 49

Subtopic:  Collisions |
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A particle of mass 4M kg at rest splits into two particles of mass M and 3M. The ratio of the kinetic energies of mass M and 3M would be:
1.  3 : 1
2.  1 : 4
3.  1 : 1
4.  1 : 3

Subtopic:  Collisions |
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R),
Assertion (A): When a fire cracker (rocket) explodes in mid air, its fragments fly in such a way that they continue moving in the same path, which the firecracker would have followed, had it not exploded.
Reason (R): Explosion of cracker (rocket) occurs due to internal forces only and no external force acts for this explosion.
In light of the above statements, choose the most appropriate answer from the options given below:
1.  Both (A) and (R) are correct and (R) is the correct explanation of (A)
2.  Both (A) and (R) are correct but (R) is not the correct explanation of (A)
3.  (A) is correct but (R) is not correct
4.  (A) is not correct but (R) is correct
Subtopic:  Collisions |
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