A) At what time after being ejected is the boulder moving at a speed of 19.0 m/s upward? B) At what time is it moving at a speed 19.0 m/s downward? C) When is the displacement of the boulder from its initial position zero? D) When is the velocity of the boulder zero?

A) At what time after being ejected is the boulder moving at a speed of 19.0 m/s upward? B) At what time is it moving at a speed 19.0 m/s downward? C) When is the displacement of the boulder from its initial position zero? D) When is the velocity of the boulder zero?

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 49P

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Question

A large boulder is ejected vertically upward from a volcano with an initial speed of 40.8 m/s. Air resistance may be ignored.

A) At what time after being ejected is the boulder moving at a speed of 19.0 m/s upward?

B) At what time is it moving at a speed 19.0 m/s downward?

C) When is the displacement of the boulder from its initial position zero?

D) When is the velocity of the boulder zero?

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