When the direction of motion is relevant, you would use velocity rather than speed.
i forgot
Because that's the definition of 'velocity'.'Velocity' is not just a word you use instead of 'speed' when you want to sound smart.It's meaning is different from the meaning of 'speed'.'Velocity' has two parts to it . . . speed and direction. If either of those changes, thenthe velocity has changed.
Speed and Velocity are two different things . Velocity- "the rate at which an object changes its position." Speed- "How fast an object is moving". To calculate speed and velocity, you first need to calculate distance and time. Velocity is considered to be a more logical term
Velocity is speed, plus an indication of direction. To indicate a velocity, you can indicate a speed (this will logically use units of speed), and a direction.
You can sometime use integers but often speed or velocity can also be irrational.
... a vector quantity. Speed is a scalar, meaning only the magnitude (a number) is used. If the direction of a movement is of interest, you use the word "velocity", instead, to describe the vector. A vector has both a magnitude and a direction.
The velocity tells you the speed of the hurricane, but also tells you the direction the hurricane is heading.
Speed and velocity are the same in magnitude; but speed is a scalar and velocity a vector; a vector has magnitude and direction. For example if an object is moving with a speed of 100 mph in a certain direction its velocity is 100 mph in that direction. If it changes direction ate same speed and you want to compute distance traveled, etc., you would need to use vector addition. We sometimes use speed and velocity interchangeably which is fine for talking purposes.
termial velocity has speed direction an acceleration
S is usually used for position and v for velocity or speed.
Acceleration is the change in an ogjects speed or a change in an objects direction of motion or both of these. If instead of speed you use the word velocity , which is both an object's speed and its direction of motion, then you could say "acceleration is the change in an objects velocity" and that would cover all the possibilities in one statement.
speed = wavelength x frequency therefore, you would solve this by multiplying 18 and 4 to find the speed. There isn't enough information to find the velocity. In fact, it's doubtful whether it's even appropriate to talk about the 'velocity' of a wave. 'Velocity' is not simply a word you use instead of 'speed' in order to sound smart.