Motion of Centre of Mass
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 fire cracker would have followed, had it not exploded.
Reason (R): Explosion of cracker (rocket) occurs due to internal force only and no external force acts for this explosion.
In the light of the above statements, choose the most appropriate answer from the options given below
Show answer and solution
Answer: (a)
- Assertion: only the centre of mass of the fragments continues on the original parabolic path; individual fragments fly off in different directions. So (A) is false.
- Reason: the explosion is caused by internal forces only. True.
- So the answer is (a) (A) is not correct but (R) is correct.