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Science · Grade 11

Motion in One and Two Dimensions

Learners describe motion precisely with vectors, read and draw position–time and velocity–time graphs (gradient and area), and solve problems with the constant-acceleration equations, including free fall. They finish by analysing projectiles as two independent motions, constant velocity horizontally and constant acceleration vertically, linked only by time.

  • 5 lessons
  • About 125 minutes
  • Motion check: 10 questions
  • Ways to answer: fill in the blanks, choose an answer, estimate, draw a graph, label a picture and match pairs
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What learners will discover

  • Distinguish distance from displacement and speed from velocity, use a sign convention for one-dimensional vectors, and resolve or combine perpendicular vector components.
  • Interpret and draw position–time and velocity–time graphs, using the gradient for velocity or acceleration and the area under a velocity–time graph for displacement.
  • Apply the constant-acceleration equations, including free fall with g = 9.8 m/s², choosing an equation from the known and unknown quantities.
  • Analyse projectile motion by treating horizontal motion (constant velocity) and vertical motion (constant acceleration) independently, linked by the time of flight.

Lessons

  1. Describing motion with vectors 9 steps4 practiceabout 22 min
  2. Motion graphs: gradient and area 8 steps4 practiceabout 25 min
  3. The constant-acceleration equations 9 steps6 practiceabout 25 min
  4. Free fall 9 steps6 practiceabout 22 min
  5. Projectile motion 9 steps6 practiceabout 26 min
  6. Motion check 10 questions at the end

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