What will be the change in momentum caused by a net force of 120N acting on an object for 2 seconds?

240 Ns

Explanation:

The momentum of an object is the product of its mass and its velocity:

where m is the mass of the object and v its velocity.

According to Newton's second Law of motion, the change in momentum of an object is related to the force applied by it by the equation:

where

F is the force exerted on the object

is the change in momentum

is the time elapsed

In this problem:

F = 120 N is the force exerted on the object

is the time elapsed

Therefore, the change in momentum of the object is:

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.