Physics 163

Unit 2: Newton's Laws of Motion

Problem Set C

Problem #11:

A 8.73-kg object experiences a rightward acceleration of 3.86 m/s/s when a 106.2-N rightward force is exerted upon it. Determine the magnitude of the force of friction (in Newtons) which opposes this object's motion.

• 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
• Identify an appropriate formula to use
• Perform step-by-step algebraic manipulations

The task of determining an individual force value if given mass and acceleration information is discussed in detail at The Physics Classroom.

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

The relationship between mass and weight is discussed in detail at The Physics Classroom.

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