Ahockey player hits a puck with her stick, giving the puck an initial speed of 4.40 m/s. if the puck slows uniformly and comes to rest in a distance of 22.0 m, what is the coefficient of kinetic friction between the ice and the puck?

To solve this problem it is necessary to make a correlation between the energy lost by the frictional force and the kinetic energy by the puck.

Considering the definitions for the friction force as a product between the coefficient of friction and the normal force (mass by gravity) we have to:

Where,

= Distance traveled

v = Velocity of the puck

m = mass of the puck

g = Gravitational acceleration

Coefficient of kinetic friction

Re-arrange to find the Coefficient of kinetic friction

Replacing we have finally,

Therefore the coefficient of kinetic friction between the ice and the puck is 0.0448

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.