Question

Mention kinametical 1st ,2nd and 3rd equation of motion under force of gravity.

Class -9

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Answer 1

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⚫ Kinametical 1st equation of motion is given by v = u + at

Take a = g

Therefore, v = u +gt

⚫ Kinametical 2nd equation of motion is given by s = ut + 1/2 at^2

Take s= h

Therefore, h = ut + 1/2 gt^2

⚫Kinametical 3rd equation of motion is given by v^2 = u^2 + 2as

Take a = g and s = h

Therefore, v^2 = u^2 + 2gh

Answer 2

$\huge\boxed{\underline{\underline{\blue{\mathfrak{Answer}}}}}$

•we get the first kinamathica equation frrom the equation

${v} = u + at$

where we take a=g and the equation becomes v=u+gt

•we get the second equation from the equation

$s = ut + \frac{1}{2} a {t}^{2}$

where we take s=h and get

$h = ut + \frac{1}{2} a {t}^{2}$

•we get the third equation from the equation

${v}^{2} = {u}^{2} + 2as$

keeping a=g and s=h we get

${v}^{2} = {u}^{2} + 2gh$

$<marquee direction="left">$Hope it helps