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John throws a rock down with speed 11m/s from the top of a 25-m tower. If g=9.8m/s^2 and air resistance is negligible, what is the rock's speed just as it hits the ground?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter11: Energy And Its Conservation

Section: Chapter Questions

Problem 83A

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John throws a rock down with speed 11m/s from the top of a 25-m tower. If g=9.8m/s^2 and air resistance is negligible, what is the rock's speed just as it hits the ground?

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