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Speed is distance divided by time. It requires a 'background' reference frame to specify distance.
It's direction and speed may be represented by a 'vector', which is a line in the direction of travel ,of a defined length proportional to speed. But be careful with vectors, like points and lines they are 'mathematical and geometrical abstractions' an have no analogue in nature (reality).
It is poorly understood, but 'propagation speed' is always with respect only to the LOCAL background. i.e. A Light signal in a train moves at c wrt the train (d/t) not the tracks (on Venus or Earth). This was complicated by Special Relativity which was valid only for a 'perfect vacuum'. No perfect vacuum can actually exist. However an upgraded interpretation is not yet admitted into mainstream physics.
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EzraThis is often referred to as an object's velocity. The Si unit for velocity is meters per second. The measurement of velocity differs from speed in that an object's velocity can be either positive or negative depending on the direction of the object in question. Whereas speed is only a quantitative measurement.
For example:
consider a car going east at 50 meters per second then after a while it turned around and came back at 50 meters per second. In which direction did the car have a positive velocity.
Positive velocity is typically defined as movement in the initial direction. The car had movement on the first leg of its journey. When the car came back it had a negative velocity.
When an object is moving in a certain direction, it has a magnitude (speed in this case) and its direction. Since we know that D=rt (Distance equals rate times time) we can modify it to find the speed. Now we have r=D/t (rate equals distance over time). This formula will allow you to find the speed of the object in that direction.
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What is the speed of an object in an particular direction?
The speed of an object in a particular direction is known as its velocity. Velocity is a vector quantity that includes both speed (magnitude) and direction. It is important to specify both the speed and the direction to fully describe the motion of an object.
What is Speed in a specified direction?
Speed in a specified direction, also known as velocity, is the rate at which an object moves in a particular direction. It not only includes the magnitude of the speed, but also the direction in which the object is moving. Velocity is a vector quantity that takes into account both speed and direction.
The speed of an object in a particular direction?
velocity
What is a measure of both speed and direction of an object?
Velocity is a measure of both speed and direction of an object. It indicates the rate at which an object changes its position in a particular direction over time.
Is speed a scalar or vector?
Speed is a scalar quantity because it only has magnitude and not direction. It tells you how fast an object is moving without specifying a particular direction.
