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Author Question: In a given frictionless displacement of a particle, its kinetic energy increases by 25 J while its ... (Read 20 times)

ashley

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on: Jul 28, 2018
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.
 a. -15 J
  b. +35 J
  c. +15 J
  d. -35 J
  e. +55 J

Question 2

A 2.0-kg block sliding on a rough horizontal surface is attached to one end of a horizontal spring (k = 250 N/m) which has its other end fixed. The block passes through the equilibrium position with a speed of 2.6 m/s and first comes to rest at a displacement of 0.20 m from equilibrium. What is the coefficient of kinetic friction between the block and the horizontal surface?
 a. 0.32
  b. 0.45
  c. 0.58
  d. 0.19
  e. 0.26


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rosiehomeworddo

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Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

B


ashley

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Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review

rachel

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Reply 3 on: Yesterday
Wow, this really help

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