The velocity of an object is usually defined as the rate of displacement that a particle or an object undergoes within a span of time. Velocity is stated to be a physical vector quantity meaning both direction and magnitude have to be considered to define it.
However, speed and velocity should not be confused. There is a great distinction between the two; for example, velocity tells us about the object’s speed and in which direction it is moving, while speed gives us an idea of how fast the object is moving. While it is important to remember this fact, we will study the unit of velocity in this article.
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First, let us take a look at the formula of velocity
\(\begin{array}{l} V = \frac{Displacement}{Time\,Taken}=\frac{s}{t}\end{array} \)
Here,
V is the velocity
s is displacement
t is the time taken
If we remember, displacement is usually addressed in metres, and the time taken is depicted in seconds. Therefore, velocity is expressed in metres/second or m/s.
The SI unit of velocity is metre per second (m/s).
Alternatively, the velocity magnitude can also be expressed in centimetres per second (cm/s).
Some Other Velocity Units
Some of the other units that identify velocity are:
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Frequently Asked Questions – FAQs
Q1
What is velocity?
The velocity of an object is usually defined as the rate of displacement that a particle or an object undergoes within a span of time. Velocity is stated to be a physical vector quantity meaning both direction and magnitude have to be considered to define it.
Displacement is defined as the change in the position of a body.
Q3
What is the difference between speed and velocity?
There is a great distinction between the two; for example, velocity tells us about the speed of the object and in which direction it is moving, while speed gives us an idea of how fast the object is moving.
Q4
What is the formula of velocity?
\(\begin{array}{l} V = \frac{Displacement}{Time\,Taken}=\frac{s}{t}\end{array} \)
Here, V is the velocity, s is displacement t is the time taken
Q5
What is the SI unit of velocity?
The SI unit of velocity is metres per second (m/s). Alternatively, the velocity magnitude can also be expressed in centimetres per second (cm/s).
Velocity is defined as the rate of change of distance of a body with respect to time. Its unit in SI is m/s. Velocity is defined as the rate of change of displacement of a body with respect to time. Its unit in SI is m/s.
The velocity of an object can be calculated from the displacement-time graph of the object, and its SI unit is m/s. On the other hand, the acceleration of an object can be calculated from the velocity-time graph of the object, and its SI unit is m/s^2.
Average velocity is defined as the change in position or displacement (∆x) divided by the time intervals (∆t) in which the displacement occurs. The average velocity can be positive or negative depending upon the sign of the displacement. The SI unit of average velocity is meters per second (m/s or ms-1).
The SI unit of motion is meter per second (m/s) because motion is deined as change in position of object with respect to its surrounding in given interval of time.
According to the 1957 physics textbook by Max Jammer, the term work was introduced in 1826 by the French mathematician Gaspard-Gustave Coriolis as "weight lifted through a height", which is based on the use of early steam engines to lift buckets of water out of flooded ore mines.
A force is a push or pull that causes a change in motion and involves an interaction between two objects. A force can cause an object to start moving, slow down, speed up, change direction, or stop moving.
To summarize, speed and velocity are similar but different. Speed is a measure of distance traveled over time, where distance refers to how much ground is covered by an object in motion. Velocity is a measure of displacement over time, and displacement refers to the net change in position of an object in motion.
Yes. These are the possible scenario. Scenario 0: When a body travels in a straight line directed to only one point forward at equal distance at equal intervals of time the average speed is uniform and its average velocity velocity equals its average speed. There is no difference between the two quantities.
Relative Velocity can be calculated considering the velocity of object A with respect to object B. The SI unit of Relative velocity is Meter per second (m/s). The dimension of relative velocity is M0L1T-1.
The SI unit of force is the newton, symbol N. The base units relevant to force are: The metre, unit of length — symbol m. The kilogram, unit of mass — symbol kg.
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