Here is the problem:(adsbygoogle = window.adsbygoogle || []).push({});

A hockey puck is hit on a frozen lake and starts moving with a speed of 13.0 m/s. Five seconds later, its speed is 5.20 m/s.

(a) What is its average acceleration?

I used the kinematic equation V=Vo+at to find the accerlation which came out to be -1.56 m/s^2 (this answer is right).

(b) What is the average value of the coefficient of kinetic friction between puck and ice?

(c) How far does the puck travel during the 5.00 s interval? m

I used X-Xo=1/2[V+Vo]t to solve this and got 45.5 m, which is right.

So basically, I'm stuck on part B of this problem. I don't remember my professor going over how to solve this particular type of problem in class so I was hoping someone here could get me started. I'm not asking for the answer, just an explanation of how to solve Part B.

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# Homework Help: Coefficients of kinetic friction, help PLEASE!

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