Answer
43.87 km/h
Work Step by Step
We know that the final momentum is equal to the initial momentum. Thus, using the fact that $p=mv$, we find:
$$(1200)(50)+(4400)(35)+(1500)(65) = (1200+4400+1500)v $$
$$ v = 43.87 \ km/h$$
Essential University Physics: Volume 1 (3rd Edition)
by Wolfson, Richard
Published by
Pearson
ISBN 10:
0321993721
ISBN 13:
978-0-32199-372-4
Chapter 9 - Exercises and Problems - Page 164: 46
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