Question

Initial = 25m/s, Final = 10m/s & Average speed = 3ms^-1 then, Calculate the Time.

Answer 1

$\huge\sf \green{\underline{\red{\underline{\blue{\underline{\orange{Given :-}}}}}}}$

1. Initial = 25 m/s
2. Final = 10 m/s
3. Average Speed $= {3ms}^{-1}$

$\huge\sf \green{\underline{\red{\underline{\blue{\underline{\orange{To \: Find :-}}}}}}}$

• Calculate the time.

$\huge\sf \green{\underline{\red{\underline{\blue{\underline{\orange{Formula :-}}}}}}}$

• Average Speed $= \frac{v - u}{t}$

$\huge\sf \green{\underline{\red{\underline{\blue{\underline{\orange{Solution :-}}}}}}}$

Average speed $= \frac{v - u}{t}$

→ ${3ms}^{-1} = \frac{25 - 10}{t} {m/s}^{-1}$

→ $t = \frac{25-10}{3}$

→ $t = \frac{\cancel{15}}{\cancel{3}}$

→ $\boxed{t = 5 sec}$

Answer 2

$\star\:\:\:\large\underline\blue{Given:—}$

☞︎︎︎ Initial velocity, u = 25 m/s

☞︎︎︎ Final velocity, v = 10 m/s

☞︎︎︎ Average speed, s = 3 m/s

$\star\:\:\:\large\underline\blue{To\:find:—}$

Time, t = ?

$\star\:\:\:\large\underline\blue{Solution:—}$

We know that,

$\boxed{\bf{\red{s=\frac{d}{t}}}}$

$➝t=\frac{d}{s}$

$➝t=\frac{u—v}{s}$

$➝t=\frac{25–10}{3}$

$➝t=\frac{15}{3}$

$\boxed{\bf{\green{t=5\:seconds}}}$

Therefore,the time is 5 seconds

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