Physics - Forces and Accceleration

Physics - Forces and Accceleration

1. An object needs a force to start moving

   • If the resultant force on a stationary object is zero, the object will remain stationary

2. No resultant force means no change is velcoity

   • If there is no resultant force on a moving object it will just carry on moving at the same velcoity
   • When an object is moving at a constant velocity then the forces on it must all be balanced
   • To keep going at a steady speed there must be zero resultant force

3. A resultant force means acceleration

   • If there is a non-zero resultant force, then the object will accelerate in the direction of the force
   • A non-zero acceleration will always produce acceleration (or deceleration)
   • This acceleration can take five different forms:
     • Starting
     • Stopping
     • Speeding up
     • Slowing down
     • Change in direction