m = 0.350 kg. (c) Is the original energy in the spring or in the cord? (d) Explain your answer to part (c). (e) Is the momentum of the system conserved in the bursting-apart process? Explain how that is possible considering (f) there are large forces acting and (g) there is no motion before- hand and plenty of motion afterward? 5. Two blocks of masses m alu QIC are placed on a frictionless, hor- V izontal surface. A light spring is attached to the more mas- sive block, and the blocks are pushed together with the spring between them (Fig. P9.5). 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 2.00 m/s. (a) What is the velocity of the block of mass m? (b) Find the system's original elastic potential energy, taking 3m m Before 2.00 m/s 3m After Figure P9.5

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Chapter1: Units, Trigonometry. And Vectors
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5. (a) –6.00î m/s (b) 8.40 J
in the spring. (d) A force had to be exerted over a dis-
placement to compress the spring, transferring energy
into it by work. The cord exerts force, but over no dis-
placement.
the value zero.
(c) The original energy is
(e) System momentum is conserved with
(f) The forces on the two blocks are
internal forces, which cannot change the momentum
of the system; the system is isolated. (g) Even though
there is motion afterward, the final momenta are of
equal magnitude in opposite directions, so the final
momentum of the system is still zero.
Transcribed Image Text:5. (a) –6.00î m/s (b) 8.40 J in the spring. (d) A force had to be exerted over a dis- placement to compress the spring, transferring energy into it by work. The cord exerts force, but over no dis- placement. the value zero. (c) The original energy is (e) System momentum is conserved with (f) The forces on the two blocks are internal forces, which cannot change the momentum of the system; the system is isolated. (g) Even though there is motion afterward, the final momenta are of equal magnitude in opposite directions, so the final momentum of the system is still zero.
m = 0.350 kg. (c) Is the original energy in the spring or
in the cord? (d) Explain your answer to part (c). (e) Is the
momentum of the system conserved in the bursting-apart
process? Explain how that is possible considering (f) there
are large forces acting and (g) there is no motion before-
hand and plenty of motion afterward?
5. Two blocks of masses m ailu ne
QIC are placed on a frictionless, hor-
V izontal surface. A light spring
is attached to the more mas-
3m
m
Before
sive block, and the blocks are
pushed together with the spring
between them (Fig. P9.5).
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 2.00 m/s. (a) What is
the velocity of the block of mass
m? (b) Find the system's original
elastic potential energy, taking
2.00 m/s
3m
m
After
b
Figure P9.5
Transcribed Image Text:m = 0.350 kg. (c) Is the original energy in the spring or in the cord? (d) Explain your answer to part (c). (e) Is the momentum of the system conserved in the bursting-apart process? Explain how that is possible considering (f) there are large forces acting and (g) there is no motion before- hand and plenty of motion afterward? 5. Two blocks of masses m ailu ne QIC are placed on a frictionless, hor- V izontal surface. A light spring is attached to the more mas- 3m m Before sive block, and the blocks are pushed together with the spring between them (Fig. P9.5). 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 2.00 m/s. (a) What is the velocity of the block of mass m? (b) Find the system's original elastic potential energy, taking 2.00 m/s 3m m After b Figure P9.5
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