Calculating Coefficient of Friction for a Sliding Hockey Puck on Ice

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To calculate the coefficient of friction for a sliding hockey puck on ice, the initial speed of 20.0 m/s and a stopping distance of 115 m are used. The acceleration is determined to be -1.8 m/s², which is essential for finding the frictional force. The coefficient of friction is defined as the ratio of the frictional force to the normal force acting on the puck. Understanding the relationship between acceleration and force is crucial, as acceleration is directly proportional to the net force acting on the puck, according to Newton's second law. The discussion seeks assistance in progressing from the calculated acceleration to determining the coefficient of friction.
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a hockey puck on a frozen pond is given an initial speed of 20.0 m/s.if the puck always remains on the ice and slides 115 m before coming to rest,determine the coefficient of friction between the puck and ice.

I started solving the question by getting the acceleration (a=-1.8m/s^2) ,but I'm stuck to this point.
Please help..Thank you
 
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1.) What is the definition of the coefficient of friction?
2.) What is the relationship between acceleration and force?
 

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