1. Conservation of Momentum

2. Just like Energy, Momentum is Conserved!
Total Momentum Before = m1vi1 + m2vi2
m2* vi2
m1* vi1
m2* vf2
m1* vf1
Total Momentum After = m1vf1 +m2vf2

3. m1vi1 + m2vi2 = m1vf1 + m2vf2
Total Initial Momentum = Total Final Momentum
A 76 kg boater initially at rest in a stationary 45 kg boat, steps out of the boat and onto the dock. If the boater moves out of the boat with a velocity of 2.5 m/s to the right, what is the final velocity of the boat?
Initial Momentum
M1 =
V1 =
M2 =
V2 =
Final Momentum
M1 =
V1 =
M2 =
V2 =
75kg
75kg
0 m/s
2.5 m/s right
45 kg
45kg
0 m/s
? m/s
pi = 0 kg m/s
pf = 0 kg m/s