Two ice skaters push off against one another starting from a ...

[jjjetplane]

Two ice skaters push off against one another starting from a stationary position. The 45.0-kg skater acquires a speed of 0.375 m/s.
 
  What speed does the 60.0-kg skater acquire? Assume that any other unbalanced forces during the collision are negligible.
  A) 0.281 m/s B) 0.000 m/s C) 0.750 m/s D) 0.500 m/s E) 0.375 m/s

Question 2

Future space stations will create an artificial gravity by rotating. Consider a cylindrical space station of 380 m diameter rotating about its axis. Astronauts walk on the inside surface of the space station.
 
  What rotation period will provide normal gravity? A) 28 s
  B) 39 s
  C) 6.2 s
  D) 4.4 s

[Missbam101]

Answer to Question 1

A

Answer to Question 2

A