If a non-rotating object has no acceleration, then we can say for ...

[viki]

If a non-rotating object has no acceleration, then we can say for certain that it is
 
  A) at rest.
  B) moving at constant nonzero velocity.
  C) in mechanical equilibrium.
  D) all of the above
  E) none of the above

Question 2

The force of friction on a sliding object is 50 N. The applied force needed to maintain a constant velocity is
 
  A) more than 50 N.
  B) less than 50 N.
  C) 50 N.

[soda0602]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: C