An object moving due to gravity can be described by the motion equation y = yo + vot –gt?, where t is time, y is the height at that time, yo is the initial height (at t= 0), vo is the initial velocity, and g = 9.8 m/s² (the acceleration due to gravity). If you stand at the edge of a cliff that is 75 m high and throw a rock directly up into the air with a velocity of 20 m/s, at what time will the rock hit the ground? (Note: The Quadratic Formula will give two answers, but only one of them is reasonable.) Express your answer in seconds.

An object moving due to gravity can be described by the motion equation y = yo + vot –gt?, where t is time, y is the height at that time, yo is the initial height (at t= 0), vo is the initial velocity, and g = 9.8 m/s² (the acceleration due to gravity). If you stand at the edge of a cliff that is 75 m high and throw a rock directly up into the air with a velocity of 20 m/s, at what time will the rock hit the ground? (Note: The Quadratic Formula will give two answers, but only one of them is reasonable.) Express your answer in seconds.

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

Chapter1: Introduction And Vectors

Section: Chapter Questions

Problem 69P: A pirate has buried his treasure on an island with five trees located at the points (30.0 m, 20.0...

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