Newton's Second Law of Motion
= net force (N) 
= acceleration 
m = mass (kg) 
It is important to reduce the mass of the car to insure maximum acceleration.
What is the acceleration of a 1600 kg racecar if the net force was 4500 N?
= 4500 N
m = 1600 kg
What would the acceleration be if the mass was reduced by 150 kg?
= 4500 N
m = 1450 kg
Newton's Third Law of Motion
Often stated as:
When one object exerts a force on a second object, the second exerts a force on the first that is equal in magnitude but opposite in direction. These forces are called actionreaction forces.
Or
For every action force there exists a reaction force that is equal in magnitude but opposite in direction.
