- #1
Soniteflash
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Homework Statement
Two blocks of masses M and 2M are on a frictionless horizontal surface and are held in place with a compressed spring of negligible mass between them. If the blocks are then released and the block of mass 2M leaves the spring with a velocity v, the velocity of the center of mass of the blocks is
A zero
B -(v/2)
C -(2v/3)
D -(3v/2)
E -2v
Homework Equations
n/a ?
The Attempt at a Solution
I do not understand how the center of mass relates to the movement of the blocks. I remember from class that if an object exploded into thousands of pieces the center of mass would still be at the original position.
So I assume it is A. Zero.