Calculate the surface area of a cube with edge of 14.5cm

To find surface area of a cube, there's a formula that can be used: 6*s^2. You multiply 6 to a side or edge squared.

We know that an edge is 14.5 cm so we square it or multiply the edge by itself.

14.5*14.5 = 210.25 cm^2.
Now, we just multiply that number by 6.

210.25*6 = 1261.5 cm^2.
Hope this helps!

Suppose any object with mass in our planet.

The object will be affected by the gravitational force, that pulls the object down. Now, a table in your dining room is also affected by this force, but the table is in a surface (the ground) and it does not move.

We know that if an object does not move, then the net force acting on it is equal to zero, this means that there is a force equal and opposite ot the gravitational force.

This force is the normal force, that the ground applies on the table. This force comes as a "response" to the table pushing the ground (By 3rd Newton's law).

So two forces that are always equal and opposite are the forces caused by this law.