ched to the more massive has shown in the figure b pens, the block of mass 3r
ched to the more massive has shown in the figure b pens, the block of mass 3r
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Find velocity and e potential energy
Transcribed Image Text:Two blocks of masses m and 3m are placed on a frictionless, horizontal surface. A light spring is
attached to the more massive block, and the blocks are pushed together with the spring between
them as shown in the figure below. A cord initially holding the blocks together is burned; after that
happens, the block of mass 3m moves to the right with a speed of
V
3m = 2.25 m/s.
a
m
Before
After
3m
V
3m
b
(a) What is the velocity of the block of mass m? (Assume right is positive and left is negative.)
m/s
(b) Find the system's original elastic potential energy, taking m = 0.420 kg.
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