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Author Question: A child is riding near the outer rim of a freely-rotating playground merry-go-round. What happens if ... (Read 134 times)

ETearle

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on: Jul 29, 2018
A child is riding near the outer rim of a freely-rotating playground merry-go-round. What happens if the child walks towards the center?
 
  What will be an ideal response?

Question 2

An astronaut leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. The astronaut's destination is a star system 14.4 light-years away.
 
  (One light-year is the distance light travels in one year.) According to the astronaut, how long does the trip take?
  A) 15.0 y B) 14.4 y C) 22.7 y D) 4.20 y E) 9.34 y


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Kimmy

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

The merry-go-round rotates more rapidly because the moment of inertia has decreased while the angular momentum is conserved.

Answer to Question 2

D


ETearle

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Reply #2 on: Jul 29, 2018
TY


Kimmy

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Reply #3 on: Jul 29, 2018
You're welcome


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