physics
posted by mark .
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

physics 
Chanz
a = (vf  vi)/t
mu = Ff/Fn = ma/mg = a/g
x = 1/2(vi+vf)t
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