Momentum and Impulse
1.1 Momentum
The product of the mass and velocity of an object.
If an object is moving and has mass, then it has momentum.
Momentum is a vector and is directly proportional to velocity.
p=m×v
o p= momentum (kg.m.s-1)
o m= mass (kg)
o v= velocity (m.s-1)
The amount of force acting on an object depends on the object’s mass and how quickly the
object moves.
1.2 Change in Momentum
The momentum of an object changes when a resultant/net force acts on the object.
If an object's mass remains constant, then change in momentum will have been caused by
change in velocity.
p=pf -pi
p=mvf-mvi
p=m(vf-vi)
p= change in momentum
pf= final momentum
pi= initial momentum
1.3 Newton’s 2nd LAW in terms of momentum
The net force acting on an object is equal to Rate of change of momentum of the object in
the direction of the net force.
Fnet= p/ t Fnet=ma
Fnet=(m v)/ t
Fnet= p/ t
1.1 Momentum
The product of the mass and velocity of an object.
If an object is moving and has mass, then it has momentum.
Momentum is a vector and is directly proportional to velocity.
p=m×v
o p= momentum (kg.m.s-1)
o m= mass (kg)
o v= velocity (m.s-1)
The amount of force acting on an object depends on the object’s mass and how quickly the
object moves.
1.2 Change in Momentum
The momentum of an object changes when a resultant/net force acts on the object.
If an object's mass remains constant, then change in momentum will have been caused by
change in velocity.
p=pf -pi
p=mvf-mvi
p=m(vf-vi)
p= change in momentum
pf= final momentum
pi= initial momentum
1.3 Newton’s 2nd LAW in terms of momentum
The net force acting on an object is equal to Rate of change of momentum of the object in
the direction of the net force.
Fnet= p/ t Fnet=ma
Fnet=(m v)/ t
Fnet= p/ t
