st284200
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a car start to move from the rest with an acceleration of 0.25 metre per second square find the final velocity after 3 min​

Respuesta :

  • Initial velocity=u=0m/s
  • Acceleration=0.25m/s^2=a
  • Time=t=3min=180s
  • Final velocity=v

Using 1st equation of kinematics

[tex]\\ \bull\sf\longmapsto v=u+at[/tex]

[tex]\\ \bull\sf\longmapsto v=0+0.25(180)[/tex]

[tex]\\ \bull\sf\longmapsto v=45m/s[/tex]

⇛Initial velocity (u) = 0 m/s

⇛Acceleration (a) = 0.25 m/s²

⇛Time (t) = 3 minutes

⇛Final velocity (v) = v

Converting 3 minutes into seconds

  • 1 minute = 60 second

  • 3 minutes = 60 × 3
  • 3 minutes = 180 Seconds

☛ Using 1st equation of motion

[tex] \Large\begin{gathered} {\underline{\boxed{ \rm {\red{v \: = \: u \: + \: at}}}}}\end{gathered}[/tex]

☛ Substuting the values

[tex] \bf \large \longrightarrow \: \: v \: = \: 0 \: + \: 0.25 \: \: (180)[/tex]

[tex]\bf \large \longrightarrow \: \: v \: = \:45 \: m/s[/tex]

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