Define distance and displacement
Distance:
total length moved by an object irrespective of direction of motion
Scalar
Displacement
linear distance from a fixed position in a specified directions
Vector
m
Define Speed, Velocity and Acceleration
Speed:
rate of change of distance travelled
m/s
Velocity:
rate of change of displacement
acts in direction of change of displacement
ms^-1
Acceleration:
rate of change of velocity
acts in direction of change of velocity
ms^-2
Newton 3rd law of motion
The force exerted by one body on a second body is equal in magnitude and opposite in direction to the force simultaneously exerted
Newton’s 1st Law of motion
A body a rest will stay at rest, and a body in motion will continue to move at constant velocity, unless acted on by a resultant external force
Newtons 2nd law of motion
Rate of change of momentum is proportional to external resultant force acting on the body and is in same direction as external resultant force acting
Define linear momentum
Product of its mass and its velocity
Define mass
Mass is property of a body which resists change in motion
Inertia is natural tendency of body to obey Newton 1st law
