What is the net force excreted on the balloon

zero

Explanation:

The net force on the balloon is zero because it is travelling at a constant velocity in the horizontal direction and zero velocity in the vertical direction. It is not accelerating. Remember that the equation for force is F = ma, so for an object to have force, it must both have mass and be accelerating.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force