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I can't seem to understand what I'm doing wrong in the following problem:

"a police officer begins pursuing a speeding car when it passes. If the car moves with a constant velocity of 60.0m/s, and the officer moves with a constant acceleration of 6.0m/s^2. How long will it take the officer to catch up to the car if he begins pursuing from rest?"

I used V(final) = V(initial) + at. Substituting 60.0 for v(final), 0 for v(initial), and 6.0 for a. I solved for t and got 10.0s, but the answer is supposed to be 20.0s. What am I doing wrong?

thanks in advance

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# Need help with velocity and accel. problem

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