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# When do people use velocity instead of speed?

Updated: 9/17/2023

Wiki User

11y ago

i forgot

Wiki User

11y ago

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Q: When do people use velocity instead of speed?
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### Why we does not use speed instead of velocity?

When the direction of motion is relevant, you would use velocity rather than speed.

### Why there's a change velocity if you are changing direction?

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.

### Why is velocity and speed same unit?

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.

### How can you use integers to reprsent the speed and velocity of an object?

You can sometime use integers but often speed or velocity can also be irrational.

### Why not use speed instead of velocity?

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.

### Speed is to scalar quantity whereas velocity is to?

Velocity is to vector quantity. Speed is the magnitude of velocity, which is a scalar quantity, meaning it only has a numerical value with no direction. Velocity, on the other hand, includes direction and magnitude, making it a vector quantity.

### Why do streets and highways have speed limits rather than velocity limits?

In physics, "speed" is how fast you go and "velocity" is how fast you go in a specific direction. On the road, it doesn't matter what direction you are going, only how fast. In common language outside of physics, we usually use "speed" and "velocity" to mean the same thing. But the word "speed" is shorter, so that is usually prefered for use on signs and in writting the laws about how fast you can drive. ************************** speed is really the same as velocity (u asked this at just the right time, i just studdied this in my science! lol). So why they chose to write on the speeding signs "speed" instead of "velocity", i have no idea....But if I think about it, the word "velocity" is more of a scientific name. "speed" is more simple, and to the point...everyone knows what were talking about! AND, if they DID us the word "velocity" over "speed", then you would probably be asking the same question, but reversed- "why are there velocity limits instead of speed limits?" so....do you get where im comming from? but, good question, anyway!!Velocity would not be an accurate measurement unless the highway or street was completely straight because velocity also indicates direction.

### Acceleration is a change in speed or?

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.

### What are the instrument use in measuring for velocity?

There are many instruments for measuring speed but I am not aware of any for measuring velocity.

### Can speed and velocity be the same?

No, speed and velocity are not the same. Speed is a scalar quantity that measures how fast an object is moving, while velocity is a vector quantity that includes both speed and direction of motion. Therefore, two objects can have the same speed but different velocities if they are moving in different directions.

### What are some examples of velocity?

-- 30 miles per hour north-- 15 floors per minute up-- 10 centimeters per day southNote:"Velocity" is NOT a word that you use instead of "speed" when youwant to sound smart, and "30 miles per hour" is NOT velocity.

### What 2 things do you use to describe velocity?

The two things used to describe velocity are speed, which indicates its magnitude, and direction, which specifies its orientation in space. Velocity is a vector quantity that combines both speed and direction.