large pebble is thrown straight upwards. The ball remains in the air for a total time of 12 seconds. The minimum initial upward speed of the ball (with no air drag) was A. about 60 m/s B. about 120 m/s C. about 240 m/s D. about 72 m/s E. about 90 m/s

large pebble is thrown straight upwards. The ball remains in the air for a total time of 12 seconds. The minimum initial upward speed of the ball (with no air drag) was A. about 60 m/s B. about 120 m/s C. about 240 m/s D. about 72 m/s E. about 90 m/s

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter2: Kinematics

Section: Chapter Questions

Problem 23CQ: If an object is thrown straight up and air resistance is negligible, then its speed when it returns...

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Question

A large pebble is thrown straight upwards. The ball remains in the air for a total time of 12 seconds. The minimum initial upward speed of the ball (with no air drag) was

A. about 60 m/s
B. about 120 m/s
C. about 240 m/s
D. about 72 m/s
E. about 90 m/s

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