Question

The force acting per unit area parallel to the
surface is called​

Answer 1

Explanation:

In fluid mechanics, the surface tension is not defined in terms of a surface energy but rather as a force per unit length. In the bulk of a fluid at rest, two sub-parts of a fluid exert a repulsive force on one another, which is called the pressure. ... Contrary to pressure, surface tension is an attractive force.

Answer 2

the force acting per unit parallel to the surface is called surface tension .