Two skaters, both of mass 75 kg, are initially at rest on skates ...

[bclement10]

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

[Koolkid240]

Answer to Question 1

A

Answer to Question 2

D

[bclement10]

Wow, this really help

[triiciiaa]

Thanks for the timely response, appreciate it