Ann the Astronaut weighs 65.0 kg. She is space walking outside ...

[newyorker26]

Ann the Astronaut weighs 65.0 kg. She is space walking outside the space shuttle and pushes a 350.0-kg satellite away from the shuttle at 0.70 m/s. What speed does this give Ann as she moves toward the shuttle?
 a. 0.13 m/s
  b. 3.8 m/s
  c. 590 m/s
  d. 290 m/s
  e. 7.7 m/s

Question 2

A machine gun is attached to a railroad flatcar that rolls with negligible friction. If the railroad car has a mass of 6.35  104 kg, how many bullets of mass 35.0 g would have to be fired at 200 m/s off the back to give the railroad car a forward velocity of 0.56 m/s?
 a. 5.1E4
  b. 2.0E+3
  c. 6.5E+5
  d. 5.1E+3
  e. 6.5E+4

[zacnyjessica]

Answer to Question 1

b

Answer to Question 2

d