Speed in a particular direction is?

Answer 1

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.

Answer 2

This 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.

Answer 3

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.

Answer 4

Velocity. Velocity is a vector quantity that describes the speed of an object in a specific direction. It is calculated by taking into account both the speed and direction of motion.

Answer 5

The velocity. This is true because velocity is a vector value meaning it has magnitude and direction. If is had just a magnitude, then it would be a scalar value.

Answer 6

That's 'velocity'.

Answer 7

Velocity

Answer 8

velocity

Answer 9

velocity

Answer 10

Velocity