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Author Question: Jane and Jake are looking at what happens to body 1 of mass m and body 2 of mass 2m, initially at ... (Read 31 times)

bobypop

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on: Aug 1, 2020

Question 1

In a given frictionless displacement of a particle, its kinetic energy increases by 25 J while its potential energy decreases by 10 J. Determine the work of the nonconservative forces acting on the particle during this displacement.

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−15 J

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+35 J

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+15 J

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−35 J

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+55 J


Question 2

Jane and Jake are looking at what happens to body 1 of mass m and body 2 of mass 2m, initially at rest, when equal forces are applied separately to the two bodies. Jake says that equal forces applied for equal times do equal amounts of work on the two bodies. Jane says that the two forces do equal amounts of work only if the two bodies move equal distances in the direction of the forces. Which one, if either, is correct?

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Jake, because the speed of body 1 is half the speed of body 2, but m1v1 = m2v2.

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Jane, because work does not depend on mass, only on force times distance.

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Jake, because all bodies travel equal distances when equal forces are applied for equal times.

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Jane, because it takes the same time for all bodies to travel equal distances when equal forces are involved.

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Neither, because we can't compare the amounts of work done on bodies of different mass.
Physics for Scientists and Engineers ¦ Serway, Jewett ¦ 9th Edition
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Marked as best answer by bobypop on Aug 1, 2020

duke02

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Reply #1 on: Aug 1, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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bobypop

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Reply 2 on: Aug 1, 2020
YES! Correct, THANKS for helping me on my review

LVPMS

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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