Physics Unit 2 - Force, Acceleration And Terminal Velocity

Physics Unit 2 - Force, Acceleration And Terminal Velocity

1. Acceleration

   • Non-Resultant Force Creates An Acceleration
   • F=m*a
     • a=f/m
     • m= Mass (Kg)
       • a=Acceleration
         • F=Resultant Force

2. Forces

   • When two object interact the forces are equal and opposite
   • E.G: If you push a trolley it will push back just as hard
   • Reaction Forces
     • When two objects interact, the forces they apply on each other are EQUAL and OPPOSITE
   • Frictional Force
     • Frintion slows things down
       • If an object has no force moving it then it will always slow down and stop
       • Friction acts in the opposite direction to movement
     • To travel at a steady speed, the driving force needs to balance the frictional forces

3. Drag

   • Also know as fluids E.G: Air or Water
   • As Drag Increases, Speed Increases
     • This is because as a car speeds up it has much more friction to work against
     • Work harder to maintain steady speed
   • Terminal Velocity
     • Terminal velocity is the highest velocity attainable by an object in free fall
       • Objects falling through fluids reach a terminal velocity
         • Factors Effecting Terminal Velocity
           • Area
             • Size
             • Shape
             • A parachute with a larger surface area has a bigger resistance

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