Solving Force Problems

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# Solving Force Problems - PowerPoint PPT Presentation

Solving Force Problems. Draw free body diagrams One for each object Choose a coordinate system that simplifies problem Each object can have a separate coordinate system Set up force equations using free body diagrams Identify any action-reaction pairs Solve for the unknowns.

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## PowerPoint Slideshow about 'Solving Force Problems' - ciara

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Presentation Transcript
Solving Force Problems
• Draw free body diagrams
• One for each object
• Choose a coordinate system that simplifies problem
• Each object can have a separate coordinate system
• Set up force equations using free body diagrams
• Identify any action-reaction pairs
• Solve for the unknowns
One force diagram per object = 2 diagrams
• Select Frame of Reference aligned with slopes
• Two directions, parallel and perpendicular, per object => 2 x 2 = 4 equations of motion
Solve first equation for T:
• Substitute into third equation and solve for a
Substitute values to get numerical answer
• Since acceleration is negative, we guessed wrong and system moves to the right