Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Physics problem?
John’s mass is 97.8 kg, and Barbara’s is 56.9 kg. He is standing on the x axis at xJ = +9.68 m, while she is standing on the x axis at xB = +2.96 m. They switch positions. How far and in which direction does their center of mass move as a result of the switch?
1 Answer
- Anonymous5 years agoFavorite Answer
x_cm = Σ m*x / Σ m
first position:
x_cm = (97.8*9.68 + 56.9*2.96)kg·m / (97.8+56.9)kg = 7.21 m
second position:
x_cm' = (97.8*2.96 + 56.9*9.68)kg·m / (97.8+56.9)kg = 5.43 m
The CM moves 1.78 m ◄
toward the origin ◄ or "left" or "toward Barbara's initial location"
Hope this helps!