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Author Question: A force of 200 N is applied to a 50-kg mass in the direction of motion for a distance of 6.0 m, and ... (Read 34 times)

danielfitts88

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on: Jul 28, 2018
A force of 200 N is applied to a 50-kg mass in the direction of motion for a distance of 6.0 m, and then the force is increased to 300 N for the next 5.0 m. For the 11 m of travel, how much work is done by the varying force?
 a. 2700 J
  b. 1500 J
  c. 2400 J
  d. -1200 J

Question 2

A system is acted on by its surroundings in such a way that it receives 50 J of heat while simultaneously doing 70 J of work. What is its net change in internal energy?
 a. 70 J
  c. zero
  b. -20 J
  d. 20 J


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helenmarkerine

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

A

Answer to Question 2

B


danielfitts88

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Reply 2 on: Jul 28, 2018
Gracias!

LVPMS

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Reply 3 on: Yesterday
Excellent

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