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p=mvp = mvp=mv
extkgcdotextmcdotexts−1 ext{kg} cdot ext{m} cdot ext{s}^{-1}extkgcdotextmcdotexts−1
Vector quantity
Total ppp before = total ppp after (closed system)
No external forces; no mass/energy transfer
Total KE before = total KE after
Total KE after < total KE before
Change in momentum
Deltap=FextavDeltat=mv−muDelta p = F_{ ext{av}}Delta t = mv - muDeltap=FextavDeltat=mv−mu
Impulse
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