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# Center of Mass (CoM): Spheres Connected by a Rod M & 7M

APPHMC-TFUCZ3

Two spheres of mass $M$ and $7M$ are connected by a rod whose mass is negligible, and the distance between the centers of each sphere is $d$.

How far from the center of the $7M$ sphere is the Center of Mass for this object?

A

$d/8$

B

$d/7$

C

$d/2$

D

$6d/7$

E

$7d/8$