March 1, 2017

Homework Help: Physics

Posted by Kyle on Tuesday, August 16, 2011 at 7:38pm.

For no apparent reason, a poodle is running at a constant speed of 5.80 m/s in a circle with radius 2.3 m.

For t_delta = 0.5 s calculate the magnitude of the average acceleration a_av.

I have no idea how to start this problem because I'm trying to use this equation:

a_av = v^2/R

But the answer isn't correct.

I'm always trying to use the equation a_av = (vf - vi)/(t2 - t1)

But I'm not sure how to find vf and vi to subtract the two vectors.

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