-- Momentum is conserved. -- It doesn't magically appear. -- It doesn't evaporate and disappear. -- If new momentum shows up, it came from somewhere. -- If momentum is missing, it went somewhere. -- If no momentum came or went, then the amount of it is constant.
Momentum = (mass) x (speed)
Momentum AFTER = (mass of bullet + block) x (speed)
= (0.0758kg + 4.24kg) x (6.17 m/s)
= (4.3158 kg) x (6.17 m/s)
= 26.6285 kg-m/s (rounded)
Momentum BEFORE = the same amount, but the block isn't moving.
(mass of bullet) x (speed of bullet) = 26.6285 kg-m/s
