Question

what is virtual displasment?​

Answer 1

Explanation:

 analytical mechanics, a branch of applied mathematics and physics, a virtual displacement δri "is an assumed infinitesimal change of system coordinates occurring while time is held constant. It is called virtual rather than real since no actual displacement can take place without the passage of time."

Answer 2

In analytical mechanics, a branch of applied mathematics and physics, a virtual displacement {\displaystyle \delta \gamma } shows how the mechanical system's trajectory can hypothetically deviate very slightly from the actual trajectory \gamma of the system without violating the system's constraints.