An object accelerates when an unbalanced force acts on it. 

 

 

This means that for a given force, an object with:

·    less mass will accelerate more

·    more mass will accelerate less

 

·    Units of force are Newtons, N

1 N = 1 kg*m/s² (mass*acceleration)

 

·    Some forces we experience everyday:

·      Friction: the force that opposes motion between two surfaces that are in contact

·      Air resistance (drag): slows anything that moves through the air