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Two massless bumper boats float with negligible friction in a pool, and carry three children, 1 in boat 1 and two in boat 2. Each child has mass, M.

The boats are initially moving towards each other but Boat #1 has a speed of V and Boat #2 has a speed of 1.5V.

The boats collide head-on and afterwards Boat #2 is stopped.

  • What is the speed of Boat #1 after the collision? ______
  • Deduce the coefficient of restitution of this collision. ____
  • What percentage of energy is lost during the collision? _____%

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