8. What is the spring constant of a spring that stores 25J of elastic potential energy when compressed by7.5cm?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 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?10. A block with mass 0.50 kg is forced against a horizontal spring of negligible mass, compressing thespring a distance of 0.20 m (Fig. P43). When released, the block moves on a horizontal table top for 1.00m before coming to rest. The spring constant k is 100 N/m. What is the coefficient of kinetic frictionbetween the block and the table top?Figure P43- 100 Njm-0.50 kgH0.20 m1,00 mx=0Blockattachedto spring(a)* positiveF, negative E(6)* negativeE positive3/3()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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Description: 8. What is the spring constant of a spring that stores 25J of elastic potential energy when compressed by7.5cm?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 3

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8. What is the spring constant of a spring that stores 25J of elastic potential energy when compressed by 7.5cm?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter7: Conservation Of Energy

Section: Chapter Questions

Problem 23P

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