Physics 163

Unit 2: Newton's Laws of Motion

Problem Set B

Problem #8:

A 1379.2 kg car skids to a stop across a road surface which has a coefficient of friction of .8 with respect to the tires. Determine the acceleration of the car in m/s/s. (Hint: Begin with a free-body diagram and work out the problem in terms of variables - m, g, mu, etc.)

• Read the problem carefully and diagram the physical situation (free-body diagram)
• Identify known and unknown information in an organized manner (list on diagram)
• Take the time to plot out a strategy prior to beginning the solution (see graphic below)
• Identify an appropriate formula to use
• Perform step-by-step algebraic manipulations

General information about Set B concepts and principles can be found on the Set B Overview page.

The task of constructing a free-body diagram for a physical situation is discussed in detail at The Physics Classroom.

The task of determining an accleration value if given values of individual forces is discussed in detail at The Physics Classroom.

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