A hockey puck is hit on a frozen lake and starts moving with a speed of 12.0 m/s. Exactly 5.0 s later, its speed is 6.0 m/s. What is the puck’s average acceleration, and what is the coefficient of kinetic friction between puck and ice?
Average acceleration is
Now, if this happened due to frictional force then we can say that the frictional force acting was
So, the deceleration caused by the force is
And this is equal to