Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 2 - Exercises and Problems: 76

Answer

Please see the work below.

Work Step by Step

We know that (a) $v_f^2-v_i^2=-2g(\Delta y)$ We plug in the known values to obtain: $(0)^2-v_i^2=-2(9.8)(4.2-1.5)$ $v_i=7.3\frac{m}{s}$ (b) As $y=y_{\circ}+v_{\circ}t-\frac{1}{2}gt^2$ We plug in the known values to obtain: $(4.2-0.87)=1.5+(7.275)t-\frac{1}{2}(9.8)t^2$ $t=1.2s$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.