Problem 8E
CALC A bird is flying due east. Its distance from a tall building is given by x(t) = 28.0 m + (12.4 m/s)t – (0.0450 m/s3)t3. What is the instantaneous velocity of the bird when t = 8.00s?
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Solution 8E The instantaneous velocity of the bird is given by Now in the problem the position is given by . Differentiating the above equation with respect to t we get Now putting the given value of t in the above equation we have So the instantaneous velocity of the bird at t = 8.00 s is 13.5 m/s.
Step 2 of 3
Chapter 2, Problem 8E is Solved
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