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Author Question: A force acting on an object moving along the x axis is given by Fx = (14x - 3.0x2) N where x is in ... (Read 123 times)

genevieve1028

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on: Jul 28, 2018
A force acting on an object moving along the x axis is given by Fx = (14x - 3.0x2) N where x is in m. How much work is done by this force as the object moves from x = -1 m to x = +2 m?
 a. +12 J
  b. +28 J
  c. +40 J
  d. +42 J
  e. -28 J

Question 2

Positive work can be done
 a. by friction on the tires when a car is accelerating without skidding.
  b. by a spring when it launches a clown in the air.
  c. by a hand throwing a ball.
  d. by all of the above. e. only by (b) and (c) above.


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Sophiapenny

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

A

Answer to Question 2

E


genevieve1028

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Reply 2 on: Jul 28, 2018
Gracias!

meow1234

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Reply 3 on: Yesterday
Excellent

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