# Mechanics: Newton's Laws of Motion

## Newton's Laws of Motion: Audio Guided Solution

#### Problem 15:

After a lead-off single in the 8th inning, Earl makes an effort to steal second base. As he hits the dirt on his head first dive, his 73.2 kg body encounters 249 N of friction force. Construct a free body diagram depicting the types of forces acting upon Earl. Then determine the net force and acceleration.

## Audio Guided Solution

Click to show or hide the answer!

## 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., vo = 0 m/s; a = 4.2 m/s/s; vf = 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.

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