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Momentum Conservation in Elastic and Inelastic Collisions

Explore data, predict speeds, calculate momentum before/after collisions for cart systems and fishes in different collision scenarios.

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Momentum Conservation in Elastic and Inelastic Collisions

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  1. Conservation of Momentum in an elastic collision (#1) • Examine the data • Predict the speed of cart B after the elastic collision. • Determine the momentum for the 2-cart system before and after the collision. A B After the collision Cart A mass = 1 kg Cart B mass = 1 kg Cart A speed = 0 m/s Cart B speed = Cart A mass = 1 kg Cart B mass = 1 kg Cart A speed = 5 m/s Cart B speed = 0 m/s Before the collision

  2. Conservation of Momentum in an elastic collision (#2) • 1. Examine the data • Determine the speeds of the two carts after the collision • Determine the momentum of each cart • Determine the total amount of momentum in the 2-cart system After the collision A B Cart A mass = 1 kg Cart B mass = 1 kg Cart A speed = 5 m/s Cart B speed = -5 m/s Cart A mass = 1 kg Cart B mass = 1 kg Cart A speed = Cart B speed = Before the collision

  3. Conservation of Momentum in an elastic collision (#3) • 1. Examine the data • Determine the speed of Cart B after the collision • Determine the total amount of momentum in the 2-cart system A B After the collision Cart A mass = 5 kg Cart B mass = 1 kg Cart A speed = 5 m/s Cart B speed = 0 m/s Cart A mass = 5 kg Cart B mass = 1 kg Cart A speed = 0 m/s Cart B speed = Before the collision

  4. Conservation of Momentum in an inelastic collision Calculate the speed of the two fishes after the inelastic collision Before inelastic collision After inelastic collision Big fish mass = 4 kg Small fish mass = 1 kg Small fish speed = 5 m/s Large fish speed = 0 m/s Big fish mass + Small fish mass = Small fish + Large fish speed = m1v1 = v2 m1 + m2

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