Answer
Initially, the vertical velocity component of the bundle is zero.
Work Step by Step
At the instance that the bundle is released, gravity had yet to have time to accelerate the bundle downwards, so its vertical component is still zero.
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 4 - Motion in Two and Three Dimensions - Questions - Page 83: 7a
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