define Velocity and speed
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Answer:
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.
the speed of an object is the magnitude of the rate of change of its position with time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.
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➦The Speed is defined as change in distance with time and velocity is defined as change in displacement with time. And by looking at the definition we can verify that both quantities are different as displacement is a vector quantity and distance is a scalar quantity.
➦ The Speed can never be zero or negative on the other hand velocity can be zero or negative.
The velocity of the object changes with the change in direction, therefore the object must follow one direction. Whereas in case of speed, it continues to count even if the object changes its direction.
Ordinary laws of algebra are used to evaluate speed whereas in case of velocity vector algebra is to be used.
➦ An object travelling with 50km/h is considered to have this much speed An object travelling with 50km/h in north direction is considered to have this much velocity in that direction.
So, these were major points to distinguish velocity and speed.
We know that, When a vector quantity is divided by a scalar quantity, the result is a vector quantity.
Change is velocity with time is termed as acceleration.
Displacement is defined as the shortest path travelled by a body between its starting and end points of the journey.
Distance on the other hand is defined as the total path length covered by the body.
know more , The Speed is the quantitative measure of how fast a body is moving, whereas velocity measures not just the speed at which the body is moving but also the direction in which it is moving. In other words, speed determines only how fast something is travelling, while velocity determines how fast something is travelling, along with the direction of its movement.
As the speed emphasizes only the magnitude, it is termed as a scalar quantity. On the other hand, the velocity is a vector quantity as it focuses on both the magnitude and direction.
Speed is defined as the rate of change of distance, whereas velocity refers to the rate of change of displacement.
The average speed of a moving body can never be zero or negative. But, the velocity of a moving body can undoubtedly be zero.
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