Chapter 9, Motion and Force, 9.3 Terminal Speed

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(As the speed increases the friction increases)

1.

  • Small Velocity
  • Resultant force= mg-Fr 
  • Resultant force will be a large value
  • Therefore there is a large acceleration

2.

  • Faster Velocity
  • Resultant force= mg-Fr
  • Resultant force will be a smaller value
  • Therefore there is a smaller acceleration.

3.

  • Fastest Velocity
  • Resultant force= mg-Fr
  • Resultant force will be 0
  • Therefore there is zero/no acceleration
  • It has now hit "Terminal Velocity"

4.

  • Friction has incresed a, as the parachute has a larger surface area.
  • Resultant force= Fr-mg
  • Therefore the resultant force is large, and upwards.
  • Therefore the acceleration is large, but upwards, so it is decelerating (or has negative accelleration)

5.

  • Smaller Velocity
  • Resultant force= Fr-mg
  • Resultant force is zero
  • Therefore there…

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