hey i can't post anything
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Suchal Riaz
there are two vectors, P and p where P is initial momentum and p is final momentum.
P=mv
p=-mv
change in momentum is P-P which is same as P + (-p)
just add them like this.
-mv + (-mv) = -2mv
P=mv
p=-mv
change in momentum is P-P which is same as P + (-p)
just add them like this.
-mv + (-mv) = -2mv
http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w04_qp_1.pdf