Question

What does mechanical advantage(MA) and virtual reality(VR) mean?

Answer 1

Mechanical Advantage:

It is a measure of the force amplification achieved by using a tool, mechanical device or machine system.

In other words, it is the
the ratio of the force that performs the useful work of a machine to the force that is applied to the machine.

Virtual reality (VR):

It is a interactive computer generated experience taking place within a simulated environment, that incorporates mainly auditory and visual, but also other types of sensory feedback like haptic. This immersive environment can be similar to the real world or it can be fantastical, creating an experience that is not possible in ordinary physical reality.