(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A hockey Puck is hit and starts moving at 12m/s. Exactly 5 s later its speed is 6m/s. What is the coefficient of friction? How far has the pick traveled during the 5 s?

2. Relevant equations

[tex]\vec{F}_{net} = \Sigma \vec{F} = m \vec{a}[/tex]

[tex]f_k = \mu_k N[/tex]

3. The attempt at a solution

[tex]v = v_0 + a t[/tex]

[tex]6m/s = 12m/s + a 5s[/tex]

a= -1.2 m/s^2

[tex]x = x_0 + v_0 t + (1/2) a t^2[/tex]

[tex]x = 0m + 12*5s + (1/2) (-1.2m/s^2) 5^2[/tex]

x= 45m

Not sure how to precede. Answers are x =75m and coefficient of friction = 0.12. I apparently did the first part wrong

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# Homework Help: Calculating the coefficicent of friction

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