An object will remain in its current state of motion, unless acted on by a resultant force. An object requires a resultant force to be able to accelerate
Newton’s second law
the sum of forces acting on an object is equal to the rate of change of momentum
Also f=ma
Newton‘s third law
every action has an equal and opposite reaction. if an object exerts a force on another object, then the other object must exert a force back, that is opposite in direction and equal in magnitude.
Terminal speed
The maximum speed of an object that occurs when the resistive and driving forces acting on the object are equal to each other.
Thinking distance
Distance travelled by a vehicle in the time it takes for the driver to react
Stopping distance
Thinking distance +breaking distance
Breaking distance
Distance travelled by a vehicle in the time taken to stop it.
