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April 24, 2014

Homework Help: Physics

Posted by Anonymous on Friday, February 4, 2011 at 7:53pm.

A car is stopped at a traffic light. It then travels along a straight road so that its distance from the light is given by x(t) = bt2 - ct3, where b = 2.60 m/s2 and c = 0.150 m/s3.
(a) Calculate the average velocity of the car for the time interval t = 0 to t = 8.0 s.
m/s

(b) Calculate the instantaneous velocity of the car at the following times:
i) t = 0
m/s
ii) t = 4.0 s
m/s
iii) t = 8.0 s
m/s

(c) How long after starting from rest is the car again at rest

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