posted by vanessa .
Two blocks of masses m and M [M = 4.23m]
are placed on a horizontal, frictionless surface.
A light spring is attached to one of them, and
the blocks are pushed together with the spring
between them. A cord holding them together
is burned, after which the block of mass M
moves to the right with a speed of 2.35 m/s.
What is the speed of the block of mass m?
Answer in units of m/s.
[M = 4.23m]
makes no sense.
Mass is not measured in meters.
In a frictionless situation, total momentum is conserved.
multiple M and the velocity
Answering to drwls late, but 4.23m, the m is mass of m but it's 4.23 times greater. Hence, 4.23m.