Momentum

p=m x v

Units kg m/s

An objects momentum changes whenever its speed of mass changes

Forces creating an impulse are often large

How can we maintain an Impulse, while decreasing force?

How can we relate this to energy transfer?

Momentum Can be summed

impulse = force x time = change in momentum

impulse is a vector that points in the same direction as the force

An impulse changes an objects momentum

Momentum conservation requires a total force of zero

This is because if an external force acts on an object the momentum is changing

Internal forces (forces in the system) have no effect and sum to zero

If the sum of external forces is zero momentum is conserved

p_total= p₁+p₂=constant

Individual momentums can change but the overall system will not

Momentum conservation applies to all systems

Momentum conservation results in recoil