The forces, whose lines of action are parallel to each other and act in the same directions, are known as ?

The forces whose lines of action are parallel to each other and act in the same direction are known as Like Forces.

Explanation:

When multiple forces are exerting their influence in the same direction, they combine to produce a greater net force. This concept is fundamental in physics, particularly in the study of dynamics and statics. Like forces can be added together through simple arithmetic, which makes calculations straightforward. For instance, if two forces of 5 N and 3 N act in the same direction, the resultant force can be calculated as follows:

$F_{net} = F_1 + F_2$ $F_{net} = 5 \, \text{N} + 3 \, \text{N} = 8 \, \text{N}$

Understanding like forces is essential for analyzing systems in equilibrium or those that are accelerating. In contrast, when forces act in opposite directions, they are referred to as Unlike Forces, which require vector subtraction to determine the net effect.