A large boulder is ejected vertically upward from a volcano with an initial speed of 40.0 m/s.
Question:
A large boulder is ejected vertically upward from a volcano with an initial speed of 40.0 m/s. Air resistance may be ignored.
(a) At what time after being ejected is the boulder moving at 20.0 m/s upward?
(b) At what time is it moving at 20.0 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?
(e) What are the magnitude and direction of the acceleration while the boulder is (i) moving upward? (ii) Moving downward? (iii) At the highest point?
(f) Sketch a,-t, v,-t, and y-t graphs for the motion.
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IDENTIFY Since air resistance is ignored the boulder is in freefall and has a constant downward acce...View the full answer
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Related Book For 
University Physics with Modern Physics
ISBN: 978-0321501219
12th Edition
Authors: Hugh D. Young, Roger A. Freedman, Lewis Ford
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