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Author Question: A playground merry-go-round with a radius of 1.8 m and a rotational inertia of 120 kg m2 is ... (Read 115 times)

WhattoUnderstand

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on: Jul 29, 2018
A playground merry-go-round with a radius of 1.8 m and a rotational inertia of 120 kg m2 is stationary.
 
  A child with a mass of 25 kg gets on and walks around the edge of the merry-go-round. How many revolutions around the merry-go-round must the child make in order for the merry-go-round to make one full revolution?
  A)
 
  2.5 revolutions
  B)
 
  1.5 revolutions
  C)
 
  3.0 revolutions
  D)
 
  1.0 revolutions
  E)
 
  2.0 revolutions

Question 2

Kepler's third law can be used to compare the Moon's orbit around the Earth to the orbit of the Earth around the Sun.
 
  Indicate whether the statement is true or false


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lorealeza77

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Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

FALSE


WhattoUnderstand

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Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

xiazhe

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Reply 3 on: Yesterday
Wow, this really help

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