Two kids are roller skating. Amy, with a mass of 55 kg, is traveling forward at 3 m/s. Jenny, who has a mass of 40 kg, is traveling in the opposite direction at 5 m/s. They crash into each other and hold onto each other so that they move as one mass. How fast are they traveling?

Question

Mathematics

Jack Jefferson

26 May, 00:08

Two kids are roller skating. Amy, with a mass of 55 kg, is traveling forward at 3 m/s. Jenny, who has a mass of 40 kg, is traveling in the opposite direction at 5 m/s. They crash into each other and hold onto each other so that they move as one mass. How fast are they traveling?

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Amara Owen · Answer 1

The action of crashing would lower the speed by at least half so 1.5 + 2.5 = 4. But since you do not know in which way they crashed I would just say that this question is not telling how much they slow down so, I would just do 5 m/s + 3 m/s = 8 m/s travelling in the direction Amy was moving but since the larger mass would move the smaller mass and adjust I'd say they are both moving at 3 m/s.