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Author Question: A 0.30-kg mass attached to the end of a string swings in a vertical circle (R = 1.6 m), as shown. At ... (Read 167 times)

waynest

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on: Jul 28, 2018

A 0.30-kg mass attached to the end of a string swings in a vertical circle (R = 1.6 m), as shown. At an instant when = 50, the tension in the string is 8.0 N. What is the magnitude of the resultant force on the mass at this instant?
 
   


   
  a.
  5.6 N
   
  b.
  6.0 N
   
  c.
  6.5 N
   
  d.
  5.1 N
   
  e.
  2.2 N

Question 2

A roller-coaster car has a mass of 500 kg when fully loaded with passengers. At the bottom of a circular dip of radius 40 m (as shown in the figure) the car has a speed of 16 m/s. What is the magnitude of the force of the track on the car at the bottom of the dip?
 
   


   
  a.
  3.2 kN
   
  b.
  8.1 kN
   
  c.
  4.9 kN
   
  d.
  1.7 kN
   
  e.
  5.3 kN


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babybsemail

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

c

Answer to Question 2

b


waynest

  • Member
  • Posts: 553
Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review

yeungji

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  • Posts: 319
Reply 3 on: Yesterday
Wow, this really help

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