Question

No SIM 12:47 PM 숱 khanacademy.org A dog chases a cat until the dog gets tired. A graph of its velocity over time is shown below. Velocity In 6 Time (s) 4 8 12 16 20 24 What is the dog's average acceleration from 0 to 12 seconds? Answer using two significant figures. Do 4 problems Check again

Answer 1

From the graph it is clear that at initial time the initial velocity, u = 0 m/s At time t = 12 s the final velocity of the log is V = 8 m/s since the velocity increases linearly than we can use the relation V = u + ft or 8 = 0 + f times 12 f = acceleration of the dog or, f = 8/12 = 2/3 = 0.667 m/s^2 Hence dog�s average acceleration from 0 to 12 is 0.667 m/s^2