Question

decreases its speed from 80 km h-¹to 60km h-¹in 5s. find acceleration of the bus​

Answer 1

${\large{\pmb{\red{\underline{Given :}}}}}$

• U = Initial velocity = 80km/h-¹
• V = Final velocity = 60km/h-¹
• T = Time = 5s

${\large{\pmb{\blue{\underline{To Find :}}}}}$

• Find acceleration ?

${\large{\pmb{\orange{\underline{Solution :}}}}}$

${\large{\maltese{\underline{\bf{Formula \: for \: acceleration :}}}}}$

${\blue{\boxed{\pink{\mathfrak{Acceleration = \frac{v - u}{t} }}}}}$

${\large{\maltese{\underline{\bf{Converting :}}}}}$

${\bf{\cancel{60}km/h-¹ × \frac{5}{\cancel{18} }}}$

${\red{\boxed{\bf{1.5m/s-¹}}}}$

V = 1.5m/s-¹

${\bf{\cancel{80}km/h-¹ × \frac{5}{\cancel{18} }}}$

${\red{\boxed{\bf{22.2m/s-¹}}}}$

U = 22.2m/s-¹

${\large{\maltese{\underline{\bf{Than,}}}}}$

${\mapsto{\sf{Acceleration = \frac{v - u}{t} }}}$

${\mapsto{\sf{Acceleration = \frac{1.5- 22.2}{5} }}}$

${\mapsto{\sf{Acceleration = {\cancel\frac{ - 20.7}{5} }}}}$

${\blue{\mapsto{\red{\boxed{\bf{-4.14m/s-¹}}}}}}$

${\large{\maltese{\underline{\bf{So,}}}}}$

${\red{\underline{\green{\boxed{\bf{Acceleration = -4.14m/s-¹}}}}}}$

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Answer 2

${\large{\pmb{\red{\underline{Given :}}}}}$

Given:

Given:

U = Initial velocity = 80km/h-¹

V = Final velocity = 60km/h-¹

T = Time = 5s

${\large{\pmb{\blue{\underline{To Find :}}}}}$

ToFind:

Find acceleration ?

${\large{\pmb{\orange{\underline{Solution :}}}}}$

${\large{\maltese{\underline{\bf{Formula \: for \: acceleration :}}}}}$

${\blue{\boxed{\pink{\mathfrak{Acceleration = \frac{v - u}{t} }}}}}$

Acceleration= tv−u

${\large{\maltese{\underline{\bf{Converting :}}}}}$

${\bf{\cancel{60}km/h-¹ × \frac{5}{\cancel{18} }}}$

60

km/h−¹×

18

5

${\red{\boxed{\bf{1.5m/s-¹}}}}$

1.5m/s−¹

V = 1.5m/s-¹

${\bf{\cancel{80}km/h-¹ × \frac{5}{\cancel{18} }}}$

80

km/h−¹×

18

5

${\red{\boxed{\bf{22.2m/s-¹}}}}$

22.2m/s−¹

U = 22.2m/s-¹

${\large{\maltese{\underline{\bf{Than,}}}}}$

${\mapsto{\sf{Acceleration = \frac{v - u}{t} }}}$↦Acceleration=

t

v−u

[/tex]{\mapsto{\sf{Acceleration = \frac{1.5- 22.2}{5} }}}[/tex]↦Acceleration=

5

1.5−22.2

[/tex]{\mapsto{\sf{Acceleration = {\cancel\frac{ - 20.7}{5} }}}}[/tex]↦Acceleration=

5

−20.7

${\blue{\mapsto{\red{\boxed{\bf{-4.14m/s-¹}}}}}}$

−4.14m/s−¹

${\large{\maltese{\underline{\bf{So,}}}}}$

So,

${\red{\underline{\green{\boxed{\bf{Acceleration = -4.14m/s-¹}}}}}}$

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ItzJanhvi 10❤