Terminal velocity

• Why do object fall to the ground?

  Gravity exerts a force called weight causing it to accelerate towards the earth
• Terminal velocity 


  Maximum velocity attainable
• What is the resultant force of an object falling at terminal velocity?


  Resultant force of an object falling at terminal velocity is zero
• Air resistance?

  Force of air resistance is caused by a moving object colliding with particles in the air
• Which two forces are in balance when a falling object reaches terminal velocity?

  Weight and air resistance will nance and cancel each other out
• Why do falling object reach terminal velocity?

  As object accelerates velocity increases so air resistance increases

  At some point force of weight acting downwards will equal air resistance upwards so no resultant force

  This means no more acceleration and velocity will stay constant
• What happens when a parachuter opens their parachute?

  Weight stays the same, but air resistance increases