Question

$\red{\maltese}\bf \: \underline{ Question} :$
Write down all the formulas of chapter MOTION

$\sf \implies Chapter \: no. \: [8]$
$\sf \implies Class : 9th$
$\sf \implies Subject : Physics$


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Answer 1

Answer:

Explanation:

The formulas which are related to Motion chapter.. But wait!

Learn the variables first :-

• v - Final Velocity / Final Speed
• u - Initial Velocity / Initial Speed
• s - displacement
• t - time
• a - acceleration.

I've already arranged it - Learn VUSTA to remember the abbreviations

$\tt{\dfrac{v - u}{t} = a}$

$\tt{Speed = \dfrac{Distance}{Time}}$

$\tt{Velocity = \dfrac{Displacement}{Time}}$

$\tt{ v^2 - u^2 = 2a \times s}$

Or

$\tt{v^2 = 2 a  \times + u^2 }$

$\tt{s = u \times t \times \dfrac{1}{2} \times a \times t^2}$

$\tt{ Average \ Speed = \dfrac{Total \ Displacement}{Total \ time}}$

$\tt{v = u +a \times t}$

These are the formulas, hence the required answer.

Some Points that you need to remember:-

Consider the question:-

Q. A ghost ran 2 times, 200 miles around a circular track for capturing it's prey. He returned to his original position. Calculate the distance and displacement.

Here, distance = 2*200 = 400 miles

But, as he returned to his original position, the displacement is zero.

Answer 2

$\red{\maltese}\bf \: \underline{ Question} :$

⠀⠀⠀⠀⠀▪︎⠀Write down all the formulas of chapter MOTION ?

Answer :

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀Formulas related to Chapter MOTION :

$\qquad\sf 1 .\: Average \:\:Speed \: \:=\: \dfrac{ Total \:Distance \:Travelled \:}{Total \:Time \:Taken \:}$

$\qquad\sf 2 .\: Average \:\:Velocity \: \:=\: \dfrac{ Displacement \:}{Change\:in \:Time \: \:}$

$\qquad\sf 3 .\: Acceleration \: \:=\: \dfrac{ (v)\: Final \:Velocity \:-\:(u)\:Initial \:Velocity \:}{\:Time \: \:}$

$\qquad\sf 4 .\: Momentum \:(p)\: \:=\: Mass\:(m)\: \times \:Velocity \:(v)\:$

$\qquad\sf 5 .\: Displacement \:\: \:=\: Final \:Position \:- \:Initial \:Position \:$

⠀⠀⠀⠀⠀Now , THREE EQUATIONS of MOTION :

• First Equation of Motion :

$\qquad \sf \: v\:\:=\:\;u \:+\: at \:\:$

• Second Equation of motion :

$\qquad \sf \: v^2\:\:=\:\;u^2 \:+\: 2as \:\:$

• Third Equation of Motion :

$\qquad \sf \: s\:\:=\:\;ut \:+\: \dfrac{1}{2}at^2 \:\:$

⠀⠀⠀⠀⠀Here , s is the Displacement, u is the Initial velocity, v is the final velocity, a is the Acceleration & T is the time of motion .

⠀⠀⠀⠀⠀Now , According to Principle of CONSERVATION of MOMENTUM :

$\qquad \qquad \boxed{\qquad\underline { \bf m_1 u_1 + m_2 u_2 = m_1 v_1 + m_2 v_2}}$

⠀⠀⠀⠀⠀Here , $\bf m_1$ is the mass of Object 1 , $\bf m_2$ is the mass of Object 2 , $\bf u_1$ is the Initial velocity of object 1 $\bf u_2$ is the Initial velocity of object 2 , $\bf v_1$ is the final velocity of Object 1 & $\bf v_2$ is the Final velocity of object 2 .