Homework Help: physics

Posted by salik on Wednesday, August 31, 2011 at 9:46pm.

A cheetah is hunting. Its prey runs for 2.9 s at a constant velocity of +9.9 m/s. Starting from rest, what constant acceleration must the cheetah maintain in order to run the same distance as its prey runs in the same time?

physics - Henry, Friday, September 2, 2011 at 6:22pm
d1 = 9.9m/s * 2.9s = 28.71m.

d = Vo*t + 0.5at^2 = 28.71m
0 + 0.5a(2.9)^2 = 28.71,
1.45a = 28.71,
a = 19.8m/s^2.

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