momentum changes in the same direction
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Momentum Basics
Momentum BasicsMomentum is in the same direction as velocity. Scientists calculate momentum by multiplying the mass of the object by the velocity of the object. It is an indication of how hard it would be to stop the object. ... The momentum of an object will never change if it is left alone.
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The product of the mass and velocity of an object is called its momentum. Momentum is a vector quantity that has the same direction as the velocity of the object and is represented by a lowercase letter p. ... According to Newton's first law, the velocity of an object cannot change unless a force is applied.
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