The speed of a 3.5-N hockey puck sliding across a level icy surface decreases at a rate of 0.45 m/s2. The coefficient of kinetic friction between the puck and the ice is . Round your answer to the nearest hundredth.

The coefficient of kinetic friction between the puck and the ice is 0.05.

Explanation:

Given that,

Weight of the hockey puck, W = mg = 3.5 N

Acceleration of the hockey puck,

The frictional force opposing the motion of the puck is given by

This force is balanced by the force due to motion of the hockey puck. So,

or

So, the coefficient of kinetic friction between the puck and the ice is 0.05. Hence, this is the required solution.

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