Physics: 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.

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The speed of a 3.5-N hockey puck sliding across

u8p4

21.01.2022

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, $a=0.45\ m/s^2$

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

$F=\mu N$

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

$\mu N=ma\\\\\mu mg=ma\\\\\mu=\dfrac{a}{g}\\\\\mu=\dfrac{0.45}{9.8}\\\\\mu=0.045$

$\mu=0.05$

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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