Question

Find the final velocity when acceleration is 2 m/s and time is 5 sec and initial velocity is 18 km/hr

Answer 1

$Answer:$

u = 18 km/h = 5 m/s

a = 2 m/s²

t = 5 sec

From 1st equation,

v = u + at

   = 5 +2×5 

   = 15 m/s

Answer 2

${\large{\pmb{\sf{\underline{Given \; that...}}}}}$

★ Acceleration is 2 m/s²

★ Time is 5 second

★ Initial velocity is 18 km/hr

${\large{\pmb{\sf{\underline{To \; find...}}}}}$

★ Final velocity.

${\large{\pmb{\sf{\underline{Solution...}}}}}$

★ Final velocity = 15 m/s

${\large{\pmb{\sf{\underline{Using \; concept...}}}}}$

★ Formula to change km/h into m/s

★ 1st equation of motion.

${\large{\pmb{\sf{\underline{Using \; formulas...}}}}}$

★ To change km/h into m/s we have to multiply given number by 5/18

★ 1st equation of motion => v = u + at

${\large{\pmb{\sf{\underline{Where,}}}}}$

★ v denotes final velocity

★ u denotes initial velocity

★ a denotes acceleration

★ t denotes time

${\large{\pmb{\sf{\underline{Full \; Solution...}}}}}$

~ Firstly let us convert km/h into m/s. Let's convert!

↝ 5/18 × 18

↝ 5 m/s

~ Now let's use 1st equation of motion, putting the values. Let's do it!

↝ v = u + at

↝ v = 5 + 2(5)

↝ v = 5 + 2 × 5

↝ v = 5 + 10

↝ v = 15 m/s

• Henceforth, 15 m/s is the final velocity when acceleration is 2 m/s and time is 5 second and initial velocity is 18 km/hr.