Posted by **Daniel Tavera** on Wednesday, October 3, 2012 at 6:17pm.

A hockey puck is given an initial speed of

30 m/s on a frozen pond. The puck remains

on the ice and slides 130 m before coming to

rest.

The acceleration of gravity is 9.8 m/s^2 .

What is the coefficient of friction between

the puck and the ice?

- Science -
**Dan**, Sunday, January 10, 2016 at 12:32am
x = (v+u)(v-u)/2a

where x = distance, v = final speed, u = initial speed, a = acceleration

substituting known values:

130 = (30)*(-30)/2a

a = -900/260 = -3.46 m/s^2

f = ma

u(k)*f(normal) = m*a

u(k)*m*g = m*a

u(k) = a/g

u(k) = 3.46/9.8 = 0.35

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