Question

plz help....................... ​

Answer 1

$\huge\bf{\underline{\purple{Answer:}}}$

Speed is defined as the distance travelled by a body per unit time. Thus,

$\Rightarrow{\boxed{\sf{\pink{ Speed= \dfrac{Distance\:travelled}{Time\:Taken}}}}}$

or

$\Rightarrow{\boxed{\sf{\red{v= \dfrac{s}{t}}}}}$

The SI unit of speed is $\displaystyle{\sf{ms^{-1}}}$,whatever the distance covered by body is expressed in metre and time in second.

A smaller unit of speed is $\displaystyle{\sf{cms^{-1}}}$.

A larger unit of speed is $\displaystyle{\sf{kmh^{-1}}}$,

Speed is a scalar quantity because it has only magnitude and no direction. The speed of a body tells us how fast or how slow the body is moving. But it does not give the direction of motion.

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Answer 2

Answer:

Speed can be thought of as the rate at which an object covers distance. ... Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second, but the most common unit of speed in everyday usage is the kilometre per hour or, in the US and the UK, miles per hour.speed is scalar quantity

hope this helps you