Question

4. 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?

Answer 1

55*3-40*5=x*95
165-200=95x
x=7/19 ms-1

Answer 2

55*3-40*5=x*95 165-200=95x x=7/19 ms-1

hope it helps ^_^