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Q: In what condition average velocity is equal to average speed give an example?

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

All of them...?

Only if the two velocities are equal in magnitude but in opposite directions.

yes

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)

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The accleration must be constant.

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

Always.

If the velocity is constant (i.e., there is no acceleration). Terminal velocity is an example, although any constant velocity would fit this description.

For example, an object goes in a circle, at a speed of 50 km/hour. The average speed is 50 km/hour; the average velocity is zero.

The magnitude of average velocity of an object equal to its average speed if that object is moving with CONSTANT velocity.

In uniform motion.

When acceleration is zero.

1. magnitude of distance covered is equal to the magnitude of displacement. 2. the motion of the object is in a straight line i.e. in a particular direction.

1. magnitude of distance covered is equal to the magnitude of displacement. 2. the motion of the object is in a straight line i.e. in a particular direction.

At a small time interval, the average velocity is approximately equal to the instantaneous velocity. However, the values of the average velocity and the instantaneous velocity approach each other , as the length of the time interval is decreased more and more.

Mainly, when the velocity doesn't change. Also, in the case of varying velocity, the instantaneous velocity might, for a brief instant, be equal to the average velocity.

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