Mechanics: Newton's Laws of Motion

Newton's Laws of Motion: Audio Guided Solution

Problem 25:

Nicholas, Brianna, Dylan and Chloe are practicing their hockey on frozen Bluebird Lake. As Dylan and Chloe chase after the 0.162 kg puck, it decelerates from 10.5 m/s to 8.8 m/s in 14 seconds.

a. Determine the acceleration of the puck.
b. Determine the force of friction experienced by the puck.
c. Determine the coefficient of friction between the ice and the puck.

Audio Guided Solution

Habits of an Effective Problem Solver

• Read the problem carefully and develop a mental picture of the physical situation. If necessary, sketch a simple diagram of the physical situation to help you visualize it.
• Identify the known and unknown quantities in an organized manner. Equate given values to the symbols used to represent the corresponding quantity - e.g., v_o = 0 m/s; a = 4.2 m/s/s; v_f = 22.9 m/s; d = ???.
• Use physics formulas and conceptual reasoning to plot a strategy for solving for the unknown quantity.
• Identify the appropriate formula(s) to use.
• Perform substitutions and algebraic manipulations in order to solve for the unknown quantity.

Read About It!

Get more information on the topic of Newton's Laws of Motion at The Physics Classroom Tutorial.

• The Kinematic Equations
• Mass and Weight
• Friction Force
• Determining Individual Force Values

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