**Unit 2: Newton's Laws of
Motion**

**Problem Set B**

**Problem #9:**

Claire deAisles applies a horizontal force of 1182.7 N to accelerate a 78.6 kg supermarket crate. The coefficient of friction between the crate and the floor is 0.80. Determine the acceleration (in m/s/s) of the crate. (Enter your answer, accurate to the third decimal place.)

- 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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