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Published byJacquelyn Wordell Modified over 2 years ago

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CHAPTER 8 Momentum & Impulse

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Momentum is a product of mass and velocity Momentum is a vector (magnitude and direction) p = m v Measured in kg m/s

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Change in Momentum: Impulse When a mass is accelerated its momentum is changed: p p = m v = F t Impulse is a product of force and time Impulse is a vector Impulse is measured in kgm/s or N s

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Conservation of Momentum The total momentum of a closed system (no outside impulses) remains constant Momentum Before = Momentum After p 1 + p 2 = p 1 ’ + p 2 ’

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Collisions Momentum is conserved Momentum before: m 1 v 1 + m 2 v 2 Momentum after: m 1 v 1 ’ + m 2 v 2 ’ Momentum before = Momentum after

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Collisions in 2D Momentum is a vector Vector sum prior to collision equals vector sum after collision REMEMBER: This is NOT an arithmetic problem

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