A force of 16 N to the west is applied to each object below. Which object will undergo the greatest change in momentum?
A. A 15 kg object that is moving east at 10 m/s
B. A 20 kg object that is moving east at 5 m/s
C. A 20 kg object that is moving east at 10 m/s
D. A 15 kg object that is moving east at 5 m/s

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

f=ma newton

f=100x2.5=250n

c) up is the direction the magnetic force is acting on the charge.