Which of the following is a reason that a fixed pully makes work easier

A fixed pully is one of many simple machines that can make work easier.  In the fixed pully system we pull down on one side of the rope and the other side goes up.  

Explanation:

The pully can change the direction of force on a rope or belt that moves along its circumference.  

With the same amount of force to pull down as we lift the toy ourselves.  

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

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.