assuming a car with a mass of 1990kg and the car is parked at the beginning of your street that is 15m long, inclined at 20° to the horizontal. If the car begins to coast down your street from rest, how fast is the car going at the end of your street, if friction is negligible (Take g = 9.8ms-2).​

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.

where is the