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Lubov Fominskaja [6]
2 years ago
5

A car starts from rest and accelerates at 2.5m/s^2 for 2s. What is the final velocity of the car

Chemistry
1 answer:
cupoosta [38]2 years ago
6 0

<h3><u>Question</u> :-</h3>

  • A car starts from rest and accelerates at 2.5m/s² for 2s. What is the final velocity of the car?

<h3><u>Required Solution </u>:-</h3>

  • The final velocity of the car is 5 m/s

<h3><u>Provided that</u> :-</h3>

  • Acceleration, a = 2.5m/s²
  • Time taken, t = 2 sec
  • Initial velocity, u = 0 m/s (As car started from rest)

<h3><u>To Calculate</u> :-</h3>

  • The final velocity of the car

<h3><u>Required Equations of Motion </u>:-</h3>

\begin{gathered}\boxed{\begin{array}{c}\\ {\pmb{\sf{Three \: equation \: of \: motion}}} \\ \\ \sf \star \: v \: = u \: + at \\ \\ \sf \star \: s \: = ut + \: \dfrac{1}{2} \: at^2 \\ \\ \sf \star \: v^2 - u^2 \: = 2as\end{array}}\end{gathered}

<h3><u>Calculation</u> :-</h3>

\pink{\qquad \pmb{ \sf\longrightarrow v \: = u \: + at}}

\qquad \pmb{\sf \longrightarrow v = 0 + 2.5 \times 2}

\qquad \pmb{ \sf\longrightarrow  v = 0 + 5}

\qquad \pmb{\sf \longrightarrow v = 5 \: ms^{-1}}

\qquad \longrightarrow {\pink{\underline{\underline{\pmb{\sf{  Final \: velocity=  5 \: ms^{-1} }}}}}}

<u>Henceforth</u> –

  • The final velocity of the car is 5 m/s

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