A 15kg box is pushed on a table with 20 Newtons of force. A frictional force of 5N opposes the motion of the box.
15kg
a) What is the net force acting on the box?
b) What is the acceleration of the box across the table?
c) What is the velocity of the box after 4 seconds if it started at rest at time Os?
d) How far did the box travel during those 4 seconds?
e) Sketch the graphs for velocity vs time, and position vs time for the first 5 seconds the
box is moving.

hypothesising or postulating

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.

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!