A hockey puck is hit on a frozen lake and starts moving, Ask an Expert

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A hockey puck is hit on a frozen lake and starts moving with a speed of 13.4 m/s. Five seconds later, its speed is 5.40 m/s.

(a) What is its average acceleration?

_________ m/s2

(b) What is the average value of the coefficient of kinetic friction between puck and ice?

______

_______________

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