The height of the disc thrown vertically upward from a point 2 meters above the ground with an initial velocity of 20 m/s is given by h = 2 + 20t - 4.9t² after t seconds. A. After how many seconds does the ball hit the ground? B. What is the velocity of the ball at the time it hits the ground? C. Find the instantaneous velocity of the ball at time t = 4.

The height of the disc thrown vertically upward from a point 2 meters above the ground with an initial velocity of 20 m/s is given by h = 2 + 20t - 4.9t² after t seconds. A. After how many seconds does the ball hit the ground? B. What is the velocity of the ball at the time it hits the ground? C. Find the instantaneous velocity of the ball at time t = 4.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter2: One Dimensional Motion

Section: Chapter Questions

Problem 79PQ

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