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Author Question: Two skaters, both of mass 75 kg, are initially at rest on skates on a frictionless ice pond. One ... (Read 116 times)

bclement10

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on: Jul 28, 2018
Two skaters, both of mass 75 kg, are initially at rest on skates on a frictionless ice pond. One skater throws a 0.3-kg ball at 10 m/s to his friend, who catches it and throws it back at 10 m/s. When the first skater has caught the returned ball, what is the velocity of each of the two skaters?
 a. 0.08 m/s, moving apart
  c. 0.08 m/s, moving towards each other
  b. 0.04 m/s, moving apart
  d. 0.04 m/s, moving towards each other

Question 2

We have an initially uncharged hollow metallic sphere with radius of 5.0 cm. I place a small object with a charge of +40 C at the center of the sphere through a hole in the surface. Find the electric field present at a point 10 cm from the sphere's center. (ke = 8.99  109 Nm2/C2)
 a. 9.0  106 N/C
  c. 2.3  106 N/C
  b. 1.1  106 N/C
  d. 36  106 N/C


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Koolkid240

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

A

Answer to Question 2

D


bclement10

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Reply 2 on: Jul 28, 2018
Excellent

AmberC1996

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

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