Question

Define speed. State its S. I. unit.​

Answer 1

Explanation:

In everyday use and in kinematics, the speed of an object is the magnitude of the change of its position; it is thus a scalar quantity

SI unit: m/s, m s−¹

Dimension: L T−¹

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Answer 2

$\huge\purple{\mathcal Speed \: :}$

• It is a scalar quantity.
• It defers or tells us how far the object is moving.
• Example : A body is moving with a speed of 10 m/s. This means a body moves 10 m in 1 second.
• A object which is at rest means not moving then it is considered has zero speed.
• The SI Unit of speed is meter per second.

$\large\blue{\sf ★ Formula \: :}$

• $\sf S \: = \: \dfrac {d}{t}$

Here,

$\quad$ S = speed.

$\quad$ d = distance.

$\quad$ t = time.