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a car is running with the velocity of 72km/hr .what will be its velocity after 5s if its acceleration is -2m/s^2?​

Answer :

  • Initial velocity=u=72km/h

Convert to m/s

[tex]\\ \rm\Rrightarrow 72\times \dfrac{5}{18}=20m/s[/tex]

  • Acceleration=a=-2m/s^2
  • Time=t=5s
  • Final velocity=v

[tex]\\ \rm\Rrightarrow v=u+at[/tex]

[tex]\\ \rm\Rrightarrow v=20+(-2)(5)[/tex]

[tex]\\ \rm\Rrightarrow v=20-10[/tex]

[tex]\\ \rm\Rrightarrow v=10m/s[/tex]

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