GCSE Combined Science (AQA)

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Parachuting

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Forces Forces and motion

Parachuting

3:18 Terminal Velocity
Spec 4.5.6.1.5
Previous Forces in Transport Next Acceleration from Velocity-Time Graphs
  • Skydivers use parachutes to lower their terminal velocity.
  • Terminal velocity is the constant speed reached when falling.
  • Parachuting is a common example of terminal velocity in exams.
  • Step 1: Skydiver accelerates downwards due to weight and air resistance.
  • Weight is stronger than air resistance initially, causing downward acceleration.
  • Step 2: Air resistance increases with speed until it equals the skydiver's weight.
  • Forces balance, resulting in no acceleration and constant speed (terminal velocity).
  • Terminal velocity is too dangerous to land at, requiring deceleration.
  • Step 3: Skydiver deploys parachute, increasing air resistance.
  • Parachute's large surface area increases collisions with air molecules.
  • Air resistance becomes stronger than weight, causing deceleration.
  • Timing of parachute deployment is crucial for effectiveness.
  • Step 4: Skydiver decelerates to a new, slower terminal velocity.
  • Air resistance decreases as the skydiver slows down.
  • New terminal velocity is safe for landing due to balanced forces.
  • Parachute allows for a slower, safer landing speed.

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