   Chapter 4, Problem 52P

Chapter
Section
Textbook Problem

A hockey puck struck by a hockey stick is given an initial speed v0 in the positive x-direction. The coefficient of kinetic friction between the ice and the puck is μk. (a) Obtain an expression for the acceleration of the puck. (b) Use the result of part (a) to obtain an expression for the distance d the puck slides. The answer should be in terms of the variables v0, μk, and g only.

(a)

To determine
The acceleration of the puck.

Explanation

Given Info: The co-efficient of kinetic friction is μk . The initial speed of the puck is v0 .

The normal force (N) equals the weight.

N=mg (I)

• m is the mass of the puck.
• g is the acceleration due to gravity.

The friction force ( Fk ) is equal and opposite to the horizontal force (F).

F=Fk (II)

Formula for friction force is,

F

(b)

To determine
The sliding distance (d).

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