When you push a coin across a Table , the unbalanced force is that force which cause the change in motion of the object.
→Here force applied by my fingers is greater than frictional force acting on the table .That's why the coin is moving forward.So force applied by my fingers and Frictional force applied by the table on the coin are Unbalanced forces.
→When the coin stops no force acts on it , so at that point of time i am not applying any force on it due to which it is not moving just it is at rest.So that Position or at that duration force acting on the coin is Balanced.
<u>Yes the first one is correct because n squared is n with the 2 above it and adding it to three gets your first answer and then the three on the outside means to multiply so your first response is correct.</u>
