GCSE Physics (AQA)

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Terminal Velocity-Time Graphs

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Forces Forces and motion

Terminal Velocity-Time Graphs

4:36 Terminal Velocity
Spec 4.5.6.1.5
Previous Parachuting Next Acceleration from Velocity-Time Graphs
  • Stages of a skydiver reaching terminal velocity and deploying a parachute can be shown on a velocity time graph.
  • Terminal velocity is the constant speed when air resistance balances weight.
  • Understanding velocity time graphs for various falling objects is necessary for exams.
  • A skydiver's graph includes all components of other graphs in this topic.
  • Velocity time graph: time on x-axis, velocity on y-axis.
  • Initial acceleration downward due to weight being greater than air resistance.
  • Positive gradient on graph as velocity increases, but gradient decreases over time as air resistance increases.
  • Skydiver reaches constant terminal velocity when air resistance balances weight, shown as a horizontal line on the graph.
  • Parachute deployment causes quick deceleration, increasing air resistance and resulting in an upward force.
  • Negative gradient curve on graph as velocity decreases, leveling off as forces balance again.
  • New lower terminal velocity reached, shown as a lower horizontal line on the graph.
  • Sudden force changes, like a coin falling into water, show similar graph shapes.
  • Skydiver landing causes a strong upward reaction force, bringing them to a stop.
  • Parachute ensures final terminal velocity is low to minimize speed change upon landing.
  • Nearly vertical line on graph from last section to x-axis where velocity is zero.
  • In exams, you may need to complete missing graph sections or interpret graph parts related to motion of falling objects.

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