A playground merry-go-round with a radius of 1.8 m and a ...

[WhattoUnderstand]

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

[lorealeza77]

Answer to Question 1

B

Answer to Question 2

FALSE

[WhattoUnderstand]

TYSM

[nguyenhoanhat]

Thanks for the timely response, appreciate it