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Steps to Solving the Problem

Steps to Solving the Problem. Drawings. Calculations. Using a free-body diagram… Draw a picture of the problem. Draw the object on which the force is being sought. Draw and label the forces and the acceleration. Choose and draw your axes.

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Steps to Solving the Problem

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  1. Steps to Solving the Problem Drawings Calculations

  2. Using a free-body diagram… • Draw a picture of the problem. • Draw the object on which the force is being sought. • Draw and label the forces and the acceleration. • Choose and draw your axes. • Determine the magnitude of the known forces and the acceleration if it is known. • Determine the angle of all of the forces and the acceleration (from the x-axis going counterclockwise). • Determine the components of each force and the acceleration. • Add the components of all of the forces. • Use Newton’s second law to solve the problem.

  3. An example… Bailey-the-Wonder-Dog is walking down a 20o slope with a constant acceleration of 1m/s2. Bailey herself has a mass of 35 kg. What is the coefficient of friction acting between each of Bailey’s legs and the slope?

  4. θ

  5. θ

  6. θ y y x x

  7. θ θ y x

  8. Weight y x

  9. Normal Force y x

  10. Friction y x

  11. Acceleration y x

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