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ProblemIdentification

# ProblemIdentification - given or asked for Yes...

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Read the Question. Read it again until you understand what it’s asking. Think Is it a kinematics question? (No forces, masses, weights given) Yes Is it a particle or rigid body? Particle Rigid Body Use relative acceleration (and relative velocity or Instant centers) (Vector method) For a single particle, use kinematics equations. For multiple particles, Use relative motion. (Vector method) No Is there a collision? Yes For the small amount of time During which the collision occurs, Use conservation of momentum And/or coefficient of restitution No Is this a single moment in time problem? Is it asking for acceleration? Yes F=ma problem Draw a FBD and MAD Apply F=ma in axial directions (Vector Method) No Is the problem over a period of time with the amount of time
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Unformatted text preview: given or asked for? Yes Impulse-Momentum problem Draw a FBD and Start/End Momentum diagrams Consider Impulse/Momentum in axial directions Consider Angular Momentum about a point. (Vector method) Is there start and end position given, but no time? Yes Work-Energy problem Draw Start/End position diagrams Write Work-Energy Equation (Scalar method) Is there an object rotating freely in a horizontal plane Yes Conservation of Angular Momentum Draw Start/End Momentum diagrams Consider Angular Momentum around a vertical axis. (Vector method) If you still don’t have the answer you need, maybe it requires more than one approach. Go back to the start and think some more....
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