Linear Momentum-defined as product of mass and velocity Units-Kgms^-1 or Ns^-1
Conservation of linear momentum-if no external forces act on a system of colliding objects, the total momentum of the object remains constant.
Total momentum before collision=total momentum after collision
-if stationary at start m2v2=0
Momentum is a vector quantity
Oblique collisions-velocitiesresolvede into perpendicular components then each direction considered separately
Momentum only conserved if no external forces act-i.e-no friction
- Force applied, object accelerates