Explain if the law of conservation of momentum is followed in following case or not? How? a) Explosion of chemical bomb b) Releasing ball attached at end of the elastic rubber.
Answers
Answer:
a- valid
b- not valid.
Explanation:
In the explosion of bomb, internal forces act on the body and we know that internal forces can't change the momentum of an object.
In the second case however force applied is by the rubber band which is external, So the momentum will not remain conserved. If the rubber and ball both are viewed as a system then force applied will become internal and the momentum conservativon will remain valid.
Answer:
Law of conservation of momentum:- The total initial momentum of a body remains constant till it is applied by an external force
a) Explosion of a bomb:-
Law of conservation of momentum is followed
Total momentum before explosion = 0
Therefore, m1•v1 + m2•v2 =0 =》 m1•v1 = -m2•v2
m1 = Mass of one part after explosion
m2 = mass of another part
v1 = velocity of one part (m1)
v2 = velocity of another part (m2)
b) No, law of conservation is not followed because the body has a potential energy and external force is applied by the elastic.
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