You can't use the first equation becuase you don't know the acceleration. Forces acting on the puck are the Force of the stick giving it the velocity, the normal force, the friction force and the weight.
Homework Statement
At a local hockey rink, a puck with a mass of .12kg is given an initial speed of 5.3m/s. If the coefficient of friction is .11, what distance does the puck slide before coming to rest?
Homework Equations
F(net)=ma, F(friction)=Coeff. x F(normal)
The Attempt at a...