Newton's Laws

• An object will not change its velocity (accelerate/decelerate) unless there is an unbalanced force acting on it.
• the acceleration/ deceleration depends on the size of the unbalanced force and the mass of the object.
  
• on a force diagram, an unbalanced force will be represented by unequal arrows
  
• unbalanced force = resultant force

3 Key Points: 

• bigger force = greater acceleration/ deceleration
• bigger mass = smaller acceleration
• to get a big mass to accelerate as fast as a small mass, it needs a bigger force      

Formula:

F=MA (force = mass x acceleration)

• acceleration of an object = proportional to the resultant force of an object
• acceleration of an object is proportional to the mass of an object
• acceleration of an object increases if resultant force increases, and decreases if mass increases