Question

Which of the following measurements is a velocity?
A. $5m/s$
B. $5\text{ }m/s\text{ }North$
C. $5\text{ }m/{{s}^{2}}$
D. $5\text{ }m/{{s}^{2}}~North$

Answer 1

The terms velocity and speed describe how quickly or slowly an object moves. We frequently encounter situations in which we must determine which of two or more objects is moving faster. If they're traveling in the same direction on the same road, it's easy to tell who's faster. However, if their motion is in the opposite direction, it is difficult to detect them.

Complete step by step solution:
The definition of velocity for an object is the rate at which the object's position changes about a frame of reference and time. It may sound complicated, but velocity simply refers to the rate at which something moves in a specific direction. It is a vector quantity, which means that to define velocity, we need both magnitude (speed) and direction. It has an SI unit of meter per second$m{{s}^{-1}}$. When the magnitude or direction of a body's velocity changes, the body is said to be accelerating.
When gravity first exerts a force on an object, its initial velocity describes how fast it travels. The final velocity, on the other hand, is a vector quantity that measures a moving body's speed and direction after it has reached its maximum acceleration.
So, A velocity of $~5\text{ }m/s$the north is a speed. Velocity is a vector quantity that must be defined in terms of both magnitude and direction. Velocity is measured in the SI (metric system) in meters per second
($m/s$) or the SI base unit ($m{{s}^{-1}}$).

Note:
An object must have a constant speed in a constant direction to have a constant velocity. The object's motion is restricted to a straight path when it has a constant direction. As a result, motion in a straight line at a constant speed is referred to as constant velocity.