Question

A car is running with the velocity of 72 km/h. What will be its velocity
after 5 s if its acceleration is -2 m/s square

Answer 1

Answer:

Final velocity (v) = 10m/s

Explanation:

Given Information -

• Initial velocity (u)= 72km/hr = 20m/s
• Time(t) = 5 seconds
• Acceleration/Retardation (a) = - 2m/s²

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To Find -

• Final velocity (v)

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Solution -

What to do?

• To find the final velocity with the given information, we'll follow the formula of Velocity Time Relation and will replace the value with the formula to attain our required solution.

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Formula used-

• $\underline{\boxed{\sf\purple{v = u+at}}}$

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Answer-

• v=u+at
• v= 20+(-2×5)
• v= 20+(-10)
• v= 20-10
• v= 10m/s

Hence, Final velocity is 10m/s.