Question: A force of 5 N is required to increase the speed of a box from a rate of 1.0 m/s to 3.0 m/s within 5 s along a level surface. What change would most likely require additional force to produce the same results?

  Options: 
 A. reduce the mass of the box
 B. increase the mass of the box
 C. make the surfaces of the box smooth
 D. make the surface of the floor smooth
Answer: B