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Author Question: A 4.0-kg mass attached to the end of a string swings in a vertical circle of radius 2.0 m. When the ... (Read 475 times)

mspears3

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on: Jul 28, 2018

A 4.0-kg mass attached to the end of a string swings in a vertical circle of radius 2.0 m. When the string makes an angle of 35 with the vertical as shown, the speed of the mass is 5.0 m/s. At this instant what is the magnitude of the force the string exerts on the mass?
 
   


   
  a.
  50 N
   
  b.
  82 N
   
  c.
  89 N
   
  d.
  11 N
   
  e.
  61 N

Question 2

An object attached to the end of a string swings in a vertical circle (R = 1.2 m), as shown. At an instant when = 30, the speed of the object is 5.1 m/s and the tension in the string has a magnitude of 20 N. What is the mass of the object?
 
   


   
  a.
  2.0 kg
   
  b.
  1.5 kg
   
  c.
  1.8 kg
   
  d.
  1.2 kg
   
  e.
  0.80 kg


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bpool94

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

b

Answer to Question 2

d


mspears3

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Reply #2 on: Jul 28, 2018
TY


bpool94

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Reply #3 on: Jul 28, 2018
You're welcome


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