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Would you rather walk in front of … or… How about… or… (at the same velocity!) Momentum p - " mass in motion" - the product of the mass and the velocity of an object p mv Momentum is a vector quantity whose direction is the same as its velocity. Units: kgm kg s Momentum p - " mass in motion" - the product of the mass and the velocity of an object p mv How do the momenta compare if they move at the same velocity? p mv p m v Momentum p - " mass in motion" - the product of the mass and the velocity of an object p mv Could they have the same momentum even though the truck is much more massive? pm v p v m