Question

What is velocity,acceleration,displacement,declaration ?

Answer 1

Displacement is a vector which points from the initial position of an object to its final position. The standard units of displacement are meters.
Velocity is a vector which shows the direction and rate of motion. The standard units of velocity are meters per second.
Acceleration is a vector which shows the direction and magnitude of changes in velocity. Its standard units are meters per second per second, or meters per second squared.
Deceleration is a special case of acceleration whereby it only applies to objects slowing down. That is when the velocity and acceration are in opposite directions,then the speed of the particle de created.

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Answer 2

ANSWER
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Velocity is the distance travelled by a body in unit time in a given direction.
SI unit = m/s

Acceleration is the rate of change of velocity.
SI unit = m/s²
Acceleration = change in velocity/time(in secs)

Displacement is the shortest length in a given direction between two points.
SI unit = m

Declaration in a special case in which acceleration is only applied to the objects slowing down.
SI unit = m/s²

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