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Author Question: A 2.0-kg body moving along the x axis has a velocity vx = 5.0 m/s at x = 0. The only force acting on ... (Read 82 times)

cherise1989

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on: Jul 28, 2018
A 2.0-kg body moving along the x axis has a velocity vx = 5.0 m/s at x = 0. The only force acting on the object is given by Fx = (4.0x) N, where x is in m. For what value of x will this object first come (momentarily) to rest?
   
  a.
  4.2 m
   
  b.
  3.5 m
   
  c.
  5.3 m
   
  d.
  6.4 m
   
  e.
  5.0 m

Question 2

A 3.0-kg block is dragged over a rough horizontal surface by a constant force of 16 N acting at an angle of 37 above the horizontal as shown. The speed of the block increases from 4.0 m/s to 6.0 m/s in a displacement of 5.0 m. What work was done by the friction force during this displacement?
 
   


   
  a.
  34 J
   
  b.
  64 J
   
  c.
  30 J
   
  d.
  94 J
   
  e.
  +64 J


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tuwy

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

b

Answer to Question 2

a


cherise1989

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  • Posts: 555
Reply 2 on: Jul 28, 2018
Thanks for the timely response, appreciate it

lindahyatt42

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  • Posts: 322
Reply 3 on: Yesterday
Wow, this really help

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