Question

John's mass is 86 kg, and Barbara's is 55 kg. He is standing on the x axis at xj = +9.0 m, while she is standing on the x axis at xb = +2.0 m. They switch positions. How far and in which direction does their center of mass move as a result of the switch?

Answer 1

That's an interesting name for a school subject.

Answer 2

John's mass is 86 kg, and Barbara's is 55 kg. He is standing on the x axis at xj = +9.0 m, while she is standing on the x axis at xb = +2.0 m. They switch positions. How far and in which direction does their center of mass move as a result of the switch?

Answer 3

They key thing you need to know is what the center of mass formula is.

Center of mass:

(m1*x1+m2*x2)/(m1+m2)


So at initial center of mass:

(86*9+55*2)/(86+55) = 6.27 m

So now do apply the same equation when they switch position:

(55*9+86*2)/(86+55) = 4.73 m


So now find the difference in position:

Final - initial position:

4.73 - 6.27 = ????

Answer 4

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Answer 5

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