There is a build-up of static electricity.

1. Weight of the object acting always downward which is due to gravitational pull

2. Buoyant force which acts always upward which equals to the weight of the displaced fluid.

3. As the objects starts moving within fluid then viscous dragging force comes into the scene and acts always opposite the direction of motion.

It might be, relative to another conductor that does not touch it.

The electric potential energy of given configuration of charges is defined as the work which must be done against the Coulomb force to rearrange charges from infinite separation to this configuration (or the work done by the Coulomb force separating the charges from this configuration to infinity). For two point-like charges Q1 and Q2 at a distance r this work, and hence electric potential energy is equal to:

E_mathrm{p,e} = frac{1}{{4piepsilon_0}}{{Q_1Q_2}over{r}}

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Yes, yes, undoubtedly correct. But what is an electrostatic force ?

Atraction between two opposite forces

Probably to dissipate any static electricity to earth, so avoiding a spark that could cause any anaesthetic build up in the air from being set alight.

friction

Grounded, with any electrical circuit, means there is a firm connection to earth, to prevent danger of electric shock or arc discharge.

friction

Which is a characteristic of static electricity

It makes electrical charges attract one another, or repel one another.