Solution: You and your friends are doing physics experiments
Chapter 8, Problem 8.7(choose chapter or problem)
You and your friends are doing physics experiments on a frozen pond that serves as a frictionless, horizontal surface. Sam, with mass 80.0 kg, is given a push and slides eastward. Abigail, with mass 50.0 kg, is sent sliding northward. They collide, and after the collision Sam is moving at 37.0 north of east with a speed of 6.00 m>s and Abigail is moving at 23.0 south of east with a speed of 9.00 m>s. (a) What was the speed of each person before the collision? (b) By how much did the total kinetic energy of the two people decrease during the collision?
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