Question

Which condition does relative velocity become zero?

Answer 1

Hint :The rate of change of an object's location with regard to a frame of reference is its velocity, which is a function of time. A definition of an object's speed and direction of motion is referred to as velocity. In kinematics, the branch of classical mechanics that explains the motion of bodies, velocity is a basic notion. Velocity is a physical vector quantity that requires both magnitude and direction to define.

Complete Step By Step Answer:
We come into situations when one or more objects move in a non-stationary frame in relation to another observer. A boat, for example, may traverse a river that is flowing at a certain velocity, or an aeroplane may meet wind while flying. In all of these cases, we must consider the influence that the medium has on the item in order to explain the object's full motion. We compute the relative velocity of the item while doing so, taking into account the particle's velocity as well as the velocity of the medium.
The phrase "relative velocity" refers to the measurement of velocity between two objects in a single coordinate system. Many systems in physics deal with the relative motion of two or more particles, therefore relative velocity is important in both classical and contemporary physics. The relative velocity in Newtonian physics is independent of the selected inertial reference frame. This is no longer the case with special relativity, in which velocities are determined by the reference frame chosen.
When two bodies travel in the same direction at the same speed, their relative velocity equals zero. A person's relative velocity with regard to the chair is zero when he or she sits in it. The chair's relative velocity to the occupant is also zero.

Note :
A two-dimensional velocity in polar coordinates is defined by a radial velocity, which is defined as the component of velocity away from or toward the origin (also known as velocity made good), and an angular velocity, which is the rate of rotation around the origin (with positive quantities representing counter-clockwise rotation and negative quantities representing clockwise rotation, in a right-handed coordinate system).