Objects 1 and 2 attract each other with a electrostatic force of 36.0 units. If the charge of Object 2 is tripled, then the new electrostatic force will be units.

Explanation:

Force of attraction between two charges is 36N

Then from coulombs electrostatic law.

The force of attraction or repulsion between two charges (q1 and q2) is directly proportional to the product of the force and inversely proportional to the square of the distance apart.

F = kq1•q2 / r².

kq1•q2 / r² = 36

Now, we are told that the second charges has increased by a factor of 3

Then,

q2' = 3q2

So, since the first charge is contact, the radius is constant and k is constant,

Then,

F is directly proportional to the second charge, so if the second charge is triple then the force is tripled

Then,

F' = 3F = 3 × 36 = 108 units

Unit of force is newton

F' = 108N

Also,

F' = kq1•q2' / r²

F' = kq1•3q2 / r².

F' = 3 × kq1•q2 / r²

Since, kq1•q2 / r² = 36

Then,

F' = 3 × 36

F' = 108 units

F' = 108N

c

explanation:

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.