Question

define the term speed and velocity also write their formula and unit?​

Answer 1

$\huge\boxed{\underline{\mathcal{\red{A}\green{N}\pink{S}\orange{W}\blue{E}\pink{R::}}}}$

¤ SPEED =

> DEFINITION = THE SPEED OF A BODY IS THE RATE OF CHANGE OF DISTANCE WITH TIME. NUMERICALLY IT IS THE DISTANCE TRAVELLED BY THE BODY IN 1S.

> FORMULA = SPEED = DISTANCE / TIME.

> UNIT = UNIT OF SPEED = UNIT OF DISTANCE / UNIT OF TIME.

¤ VELOCITY =

> DEFINITION = THE VELOCITY OF A BODY IS THE DISTANCE TRAVELLED PER SECOND BY THE BODY IN A SPECIFIED DIRECTION.

> FORMULA = VELOCITY = SPEED / TIME.

> UNIT = THE UNIT OF VELOCITY IS SAME AS THE UNIT OF SPEED i.e. THE S.I. UNIT OF VELOCITY IS METRE PER SECOND AND THE C.G.S. UNIT OS CENTIMETRE PER SECOND.

Answer 2

$\;\;\;\;\star\;{\underline{\boxed{\bf{\pink{\;Speed\;and\;velocity\;-\;}}}}}\;\star\;$

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$\star\;{\underline{\underline{\bf{\purple{Speed:-}}}}}$

• It is the rate of change of distance with respect to time.

• Rate is basically change of quantity with time only unless 8 pecfie d.

• It is a scalar quantity.

• $\sf Speed = \dfrac{Distance}{Time}$

• Distance is measured in meter and time in second therefore,
• S.I unit of speed is $\sf ms^{-1}$

• Dimensional formula of distance is $\sf \dfrac{[L]}{[T]} = [LT^{-1}]$

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$\star\;{\underline{\underline{\bf{\purple{Velocity:-}}}}}$

• It is defined as rate of change of positions.

• And also as, displacement per unit.

• It is denoted by 'v'.

• It is a vector quantity.

• $\sf Velocity = \dfrac{Displacement}{Time}$

• Displacement is measured in meter and time in second therefore,
• S.I unit of velocity is $\sf ms^{-1}$

• Dimensional formula of displacement is $\sf \dfrac{[L]}{[T]} = [LT^{-1}]$

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