Question

Define velocity. State its unit?

Answer 1

velocity= total displacement/ total time

unit m/s

Answer 2

Answer:

Velocity is defined as the rate of change of distance of a body with respect to time. Its unit in SI is km/s. B . Velocity is defined as the rate of change of displacement of a body with respect to time. Its unit in SI is km/s.

Explanation:

Velocity is a vector quantity that refers to the rate at which an object changes its position. It is a vector expression of the displacement that an object or particle undergoes with respect to time.

The SI unit of velocity is meter/second.

Velocity is a vector expression of the displacement that an object or particle undergoes with respect to time . The standard unit of velocity magnitude (also known as speed ) is the meter per second (m/s). Alternatively, the centimeter per second (cm/s) can be used to express velocity magnitude.

The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of an object's speed and direction of motion (e.g. 60 km/h to the north). Velocity is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of bodies.

Velocity

US Navy 040501-N-1336S-037 The U.S. Navy sponsored Chevy Monte Carlo NASCAR leads a pack into turn four at California Speedway.jpg

As a change of direction occurs while the racing cars turn on the curved track, their velocity is not constant.

Common symbols

v, v, v→

Other units

mph, ft/s

In SI base units

m/s

Dimension

L T−1

Velocity is a physical vector quantity; both magnitude and direction are needed to define it. The scalar absolute value (magnitude) of velocity is called speed, being a coherent derived unit whose quantity is measured in the SI (metric system) as metres per second (m/s) or as the SI base unit of (m⋅s−1). For example, "5 metres per second" is a scalar, whereas "5 metres per second east" is a vector. If there is a change in speed, direction or both, then the object has a changing velocity and is said to be undergoing an acceleration.