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RELATIVE MOTION
THE CONCEPT OF REST AND MOTION
A body is said to be at rest if it does not change its position, with respect to us, as the time passes. Whereas, a body is said to be moving or in motion if it changes its position with respect to time.
Rest and motion are both the properties […]

SYSTEMS OF PARTICLES

What is center of Mass?
The terms “center of mass” and “center of gravity” are used synonymously in a uniform gravity field to represent the unique point in an object or system which can be used to describe the system’s response to external forces and torques. […]