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Exam Strategy

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Readiness Check

You are ready when you can:

  • Convert parametric motion to p(t) in component or i,j form.
  • Compute |p(t)| and interpret as distance from origin.
  • Describe direction from velocity component signs.
  • Compute |v(t)| as speed and support claims (3.C).

Course vs AP Exam

Course scope only (Unit 4 additional topic; not on the AP Exam). These skills still matter for Unit 4 coursework and matrix topics that follow.

Tactics (course assessments)

1. Write p(t) = <x(t), y(t)> first. 2. Magnitude: sqrt(x(t)^2 + y(t)^2) for distance when needed. 3. For velocity, identify v(t) components before |v(t)|. 4. Direction: note signs of components at the time asked. 5. Quote values when justifying (3.C).

Common Traps

  • Confusing |p(t)| with |v(t)|.
  • Forgetting i,j form is equivalent to <x(t), y(t)>.
  • Unsupported direction statements.
  • Evaluating magnitude with wrong t.

Quick Checklist

  • [ ] p(t) written correctly
  • [ ] |p(t)| interpreted as origin distance
  • [ ] v(t) direction from component signs
  • [ ] |v(t)| interpreted as speed
  • [ ] Conclusion supported with data

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