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Terminal velocity
The resultant force on the body in any direction is zero
Newton’s first law
An object continues to remain stationary or to move at a constant velocity unless an external force acts on it
Newton’s second law
The rate of change of momentum of a body is equal to the net external force acting on the body
Newton’s third law
Every action has an equal and opposite reaction
Momentum Direction
Always in direction of velocity
Impulse
The change in momentum
Impulse formula
I=F(delta)t
Newton’s second law formula
F=ma
Momentum formula
P=mv
Average speed
Is the distance travelled divided by the time taken
Instantaneous speed
The rate of change of distance at a given instance in time
Distance
Total length that an object moved in a path. It is a scalar quantity
Displacement
Object’s overall change in position. It is a vector quantity
air resistance Increases if…
Surface area is greater
Air resistance decreases if…
Velocity decreases
Acceleration (in vacuum) of a falling object is:
9.8ms²
Note 
Flashcard (46)