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And object's speed refers to a magnitude of movement in relation to something (often the ground or a stationary relative object). A Vector, usually represented by an arrow, shows a scalar (some magnitude or speed) and a direction. The scalar magnitude could be an object's speed. However, without a directional component, it's not a vector, simply a speed of scalar. Velocity IS a vector because velocity by definition includes a scalar (force/speed) AND a direction in which it is moving. Therefore Velocity is a Vector, but Speed is only part of what makes a Vector.

Example: Bob is running 10 mph North along a sidewalk. His velocity is 10 miles per hour North. A Vector drawing would show an arrow 10 units long pointing North along the sidewalk. It's speed is a flat 10 mph at that given moment, it is the scalar portion of the vector without the directional component.

As an addition, Acceleration is the rate of change in Velocity. So we have a Speed- 10 mph. Then we have Velocity- 10 mph North. Acceleration is what shows his velocity changing...

How quickly does he speed up at the beginning of his run...

How quickly does he slow down at the end...

At what rate does his direction/speed change as he turns a corner...etc.

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12y ago
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12y ago

because of the direction

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Q: Why do you require velocity when you have speed?
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Related questions

What is the distance than an object travels ina given time?

speed or velocity = distance/time Speed does not require direction, i.e. it is a scalar quantity. Velocity does require direction, i.e. it is a vector quantity.


What quantity gives both the speed and the direction of an object?

Velocity gives both speed and direction of an object. While speed is a scalar quantity, velocity is a vector quantity and require direction or bearing in order to be valid.


What is the biggest difference between speed and velocity?

velocity is speed with direction; velocity is a vector and speed is a scalar


You are snowboarding at Marmot Basin and you travel 600 m in 30 seconds What is your velocity?

20 meters per second is the speed--velocity would require direction data, as well. Velocity is a vectored quantity.


What is speed in a given direction is called?

Speed in a given direction is velocity.


Diffetiate speed and velocity?

Speed has no direction, velocity does.


Is velocity the speed of a wave?

Velocity and speed are not synonyms.


Are speed and velocity different?

SPEED has the speed only; while VELOCITY has the direction and the speed.


How is velocity same from instantaneous speed?

Instantaneous speed is the magnitude of the velocity. Velocity also states the [direction] of the speed.


What is speed in a given direction?

Speed in a given direction is called velocity.


Can velocity speed up an object?

Well velocity is basically the same thing as speed but with direction (velocity can be negative or positive and speed is always positive). l velocity l = speed So a change in velocity means a change in speed.


What is the difference betweenn speed and velocity?

Velocity is speed with a direction