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Author Question: A 30-kg child sitting 5.0 m from the center of a merry-go-round has a constant speed of 5.0 m/s. ... (Read 140 times)

robinn137

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on: Jul 28, 2018
A 30-kg child sitting 5.0 m from the center of a merry-go-round has a constant speed of 5.0 m/s. While she remains seated in the same spot and travels in a circle, the work the seat performs on her in one complete rotation is
 a. 0 J.
  b. 150 J.
  c. 1 500 J.
  d. 4 700 J.
  e. 46 000 J.

Question 2

When a crate of mass m is dragged a distance d along a surface with coefficient of kinetic friction mk, then dragged back along the same path to its original position, the work done by friction is
 a. 0.
  b. -mkmgd. c. +mkmgd. d. -2mkmgd. e. +2mkmgd.


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fur

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

A

Answer to Question 2

D


robinn137

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Reply 2 on: Jul 28, 2018
Gracias!

xiazhe

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Reply 3 on: Yesterday
Excellent

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