Assume a freely falling object were somehow equipped with a speedometer on a planet where the acceleration due to gravity is 20 meters per square second. by how much would its speed reading increase each second?

the velocity will increase 20 m/sec each second

Explanation:

We have given that the acceleration due gravity is

We have to find the increase in the speed each second

We know that acceleration is nothing but rate of change of velocity as it changes so the speed will also changes with 20 m/sec  

For proper understanding

As the object is falling freely so initial velocity u =0 m/sec

Acceleration due to gravity

Time - 1 sec

From first law of motion

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.