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Velocity is a vector, which means it has a direction, but speed isn't. Speed is

the absolute value of velocity.

Velocity can be negative, meaning that the speed is opposite to the direction

that you're calling the positive direction.

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Speed is the size of velocity. But velocity also has a direction.

"30 miles per hour" is speed.

"30 miles per hour north" is velocity.

Q: Is speed equal to velocity

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Yea it is.

This is because speed is defined as the absolute value of velocity - irrespective of the direction of motion.

Speed is equal to the magnitude of velocity almost always. Speed is total distance / total time no matter which way the distance goes. Velocity is the distance from a starting point divided by total time.

Ye.s

Yes. If they are traveling in the same direction and at the same speed, then they have the same velocity.

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For the instantaneous value of average velocity, average speed and average velocity are equal.

That is the case when you are talking about instantaneous speed and velocity - or when the velocity is constant. In the case of an average speed and velocity, this relation does not hold.

speed and velocity becomes equal when a body is moving on a straight road without changing its direction.

Speed is the size of velocity. But velocity also has a direction. "30 miles per hour" is speed. "30 miles per hour north" is velocity.

It's not. Unless you add a direction to speed it will not become velocity. Since positive and negative are sometimes used to denote direction, absolute value of velocity may equal speed (certain situations)

Yea it is.

This is because speed is defined as the absolute value of velocity - irrespective of the direction of motion.

Speed is equal to the magnitude of velocity almost always. Speed is total distance / total time no matter which way the distance goes. Velocity is the distance from a starting point divided by total time.

-- The magnitude of acceleration is equal to the time rate of change of speed. -- The magnitude of acceleration is equal to the time rate of change of the magnitude of velocity. -- Acceleration and velocity are both vectors.

Ye.s

The magnitude of the velocity is always equal to the speed. But velocity is a vector quantity (has a magnitude and direction) while speed is just a scalar quantity (only magnitude). So velocity and speed are never equal.

No. Velocity is the Speed of an object, plus a component that defines its direction.