9. 9. A spring and block are in the arrangement of Fig. 7-10.When the block is pulled out to x = +4.0 cm,we must apply a force of magnitude 360N to hold it there. We pull the block to x = 11 cm and thenrelease it. How much work does the spring do on the block as the block moves from x1 = +5.0 cm to (a)x = +3.0 cm, (b) x = -3.0 cm, (c) x = -5.0 cm, and (d) x = -9.0 cm? Blockattachedto springx positiveF, negative(8)x negativeF positive()Figure 7-10 (a) A spring in its relaxed state.The origin of an x axis has been placed atthe end of the spring that is attached to ablock. (b) The block is displaced by d, andthe spring is stretched by a positive amountx. Note the restoring force F,exerted bythe spring. (c) The spring is compressed bya negative amount x. Again, note therestoring force,

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9. A spring and block are in the arrangement of Fig. 7-10.When the block is pulled out to x = +4.0 cm, we must apply a force of magnitude 360 N to hold it there. We pull the block to x = 11 cm and then release it. How much work does the spring do on the block as the block moves from x1 = +5.0 cm to (a) x = +3.0 cm, (b) x = -3.0 cm, (c) x = -5.0 cm, and (d) x = -9.0 cm? %3D

9. A spring and block are in the arrangement of Fig. 7-10.When the block is pulled out to x = +4.0 cm, we must apply a force of magnitude 360 N to hold it there. We pull the block to x = 11 cm and then release it. How much work does the spring do on the block as the block moves from x1 = +5.0 cm to (a) x = +3.0 cm, (b) x = -3.0 cm, (c) x = -5.0 cm, and (d) x = -9.0 cm? %3D

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter9: Energy In Nonisolated Systems

Section: Chapter Questions

Problem 17PQ

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Question

9. A spring and block are in the arrangement of Fig. 7-10.When the block is pulled out to x = +4.0 cm,
we must apply a force of magnitude 360N to hold it there. We pull the block to x = 11 cm and then
release it. How much work does the spring do on the block as the block moves from x1 = +5.0 cm to (a)
x = +3.0 cm, (b) x = -3.0 cm, (c) x = -5.0 cm, and (d) x = -9.0 cm?

Block
attached
to spring
x positive
F, negative
(8)
x negative
F positive
()
Figure 7-10 (a) A spring in its relaxed state.
The origin of an x axis has been placed at
the end of the spring that is attached to a
block. (b) The block is displaced by d, and
the spring is stretched by a positive amount
x. Note the restoring force F,exerted by
the spring. (c) The spring is compressed by
a negative amount x. Again, note the
restoring force,

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