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Author Question: A 2.0-kg mass swings at the end of a light string (length = 3.0 m). Its speed at the lowest point on ... (Read 95 times)

cabate

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on: Jul 28, 2018
A 2.0-kg mass swings at the end of a light string (length = 3.0 m). Its speed at the lowest point on its circular path is 6.0 m/s. What is its kinetic energy at an instant when the string makes an angle of 50 with the vertical?
 a. 21 J
  b. 15 J
  c. 28 J
  d. 36 J
  e. 23 J

Question 2

A pendulum is made by letting a 2.0-kg object swing at the end of a string that has a length of 1.5 m. The maximum angle the string makes with the vertical as the pendulum swings is 30. What is the speed of the object at the lowest point in its trajectory?
 a. 2.0 m/s
  b. 2.2 m/s
  c. 2.5 m/s
  d. 2.7 m/s
  e. 3.1 m/s


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Sarahjh

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

B

Answer to Question 2

A


cabate

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  • Posts: 537
Reply 2 on: Jul 28, 2018
Wow, this really help

amynguyen1221

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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