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Momentum/Impulse

Momentum/Impulse. Momentum Recap. Momentum: The product of the mass and velocity of an object “How hard it is to stop something” Equation: p = mv Units: p = kgm/s m = kg v = m/s Vector: When describing the momentum of an object, the direction matters. Momentum Recap.

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Momentum/Impulse

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  1. Momentum/Impulse

  2. Momentum Recap • Momentum: The product of the mass and velocity of an object • “How hard it is to stop something” • Equation: p = mv • Units: p = kgm/s m = kg v = m/s • Vector: When describing the momentum of an object, the direction matters.

  3. Momentum Recap

  4. Would you rather Would you rather? 1 m/s 100 m/s http://www.youtube.com/watch?v=JK81Ej5hm8s http://www.youtube.com/watch?v=iMq0Wyl-3ho

  5. Would you rather? 10 m/s 10 m/s

  6. Would you rather? 100 m/s 5 m/s

  7. Momentum Recap • Collision: When 2 objects interact and “exchange” momentum • 2 Moving (Bounce off) • 1 Moving (bounce off) • 1 moving (stick together) • “Explosion

  8. Momentum Recap • Conservation of Momentum: The sum of the total momentum BEFORE a collision, is the same as the sum of the total momentum AFTER a collision Momentum Before = Momentum After pi = pf p1i +p2i + p3i = p1f+p2f + p3f

  9. Momentum Recap • Conservation of Momentum: The sum of the total momentum BEFORE a collision, is the same as the sum of the total momentum AFTER a collision

  10. Real Deal • Step 1: Separate BEFORE and AFTER • Step 2: Make a table (p,m,v) for each object • Step 3: Eqtn to sum up total momentum BEFORE • Step 4: Eqtn to sum up total momentum AFTER • Step 5: Set the equations equal to each other.

  11. Impulse • IMPULSE: A change in momentum Fnett = p = mv Units = Ns

  12. Whiteboards

  13. Impulse Super Challenge: I = Ft

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