Answer
110 m/s
Work Step by Step
Instantaneous velocity v= $\frac{dx}{dt}=\frac{d}{dt}(50t+10t^{2})=50+20t$
At t=3.0 s, instantaneous velocity is
v=$\frac{dx}{dt}|_{t=3.0}=50+20(3.0)=110\,m/s$
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 2 - Motion Along a Straight Line - Problems - Page 39: 104b
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