Question

define speed and velocity for standard 9​

Answer 1

Explanation:

speed is defined as distance travelled in per unit time

velocity is defined as displacement in per unit time

Answer 2

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$\sf{\underline{Speed:}}$

• Speed can be thought of as the rate at which an object covers distance. A fast-moving object has a high speed and covers a relatively large distance in a given amount of time, while a slow-moving object covers a relatively small amount of distance in the same amount of time.

$\sf{\underline{Velocity:}}$

• The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is a physical vector quantity; both magnitude and direction are needed to define it.