physics

A hockey puck is hit on a frozen lake and starts moving with a speed of 14.0 m/s. Five seconds later, its speed is 5.50 m/s.
(a) What is its average acceleration?

m/s2

(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

asked by mark
  1. a = (vf - vi)/t
    mu = Ff/Fn = ma/mg = a/g
    x = 1/2(vi+vf)t

    posted by Chanz

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