Question

A car travelling at 40km/hr speeds upto 50km/hr in 4 seconds.Calculate the acceleration of the car.​

Answer 1

Explanation:

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Answer 2

Given that :

   Initial velocity of car is 40 km/hr

   Final velocity of car is 50 km/hr

   Time taken by car is 4 s = 1/900 hr

Need to find : Acceleration of car.

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❍  To calculate the acceleration, we have to substitute the values in the first equation of motion ::

    $\large\bold{\underline{\rm{\blue{\bigstar \;\; v = u =+ at}}}}$

Where,

• v denotes final velocity
• u denotes initial velocity
• a denotes acceleration
• t denotes time taken

T H E R E F O R E,

→ 50 = 40 + [ a × 1/900 ]

→ 50 = 40 + [ a/900 ]

→ a/900 = 50 - 40

→ a/900 = 10

→ a = 10 × 900

→ a = 9000 km/h²

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• Henceforth, acceleration of the car is 9000 km/hr²