6-7. A hockey puck travels 33 m along an ice rink before coming to
rest.
Its initial speed was 11m/s.
(a) What is the magnitude of the acceleration of the puck?
(b) What is the coefficient of kinetic friction between the puck and
the ice?
ACCUMULATED SOLUTION
We start with a sketch of the problem and a choice of +x to the right.
Which Galilean equation is useful for finding the acceleration with
the information provided?
(A) vx = v0x
+ axt
(B) x = v0x
t + (1/2) axt2
(C) vx2
= v0x2 + 2axx