Additional Physics: Part 2 Forces

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  • Created by: worker
  • Created on: 29-04-13 20:52

Falling Objects

  • When an object falls freely the resultant force is gravity. The object will accelerate at about 10m/s squared.
  • Gravity = called weight.
  • Acceleration = acceleration due to gravity.
  • F= ma
  • W=mg
  • Weight (N) = mass (Kg) x acceleration due to gravity (m/s squared)
  • If the object is not falling g= gravitational field strength (N/Kg)
  • When an object falls through a fluid the fluid exerts a drag force on the object. The faster it falls the bigger the drag. It will eventually be equal to the weight so the resultant force is zero and the object stops accelerating = terminal velocity.

Stretching and


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