An object is released from rest at an unknown height h above the ground .one second later a second object is released from rest at the same height. When the first object strikes the ground,the second is 20 m above the grounds . What is the initial height h?

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter2: Motion In One Dimension
Section: Chapter Questions
Problem 7OQ: A student at the top of a building of height h throws one ball upward with a speed of vi and then...
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An object is released from rest at an unknown height h above the ground .one second later a second object is released from rest at the same height. When the first object strikes the ground,the second is 20 m above the grounds . What is the initial height h?

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