llBlueEyesll llBlueEyesll

15-09-2021
Physics

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A car travelling at 110 km/h decelerates for 4.5 seconds to a final velocity of 45 km/h. Calculate the deceleration of the car.

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mdejazulhaque1972 mdejazulhaque1972

15-09-2021

Answer:

Final velicity=45km/h=45×5/18=12.5m/s

Initial velocity =110km/h=110×5/18=30.5m/s

Time=4.5s

Deceleration=v-u/t

=(12.5-30.5)/4.5 m/s²

=18/4.5 m/s²

=4m/s²

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