Spotting a police car, you brake a parsche from a speed of 100kmh−1 to a speed of 80.0 kmh −1 during a displacement of 88.0m, at a constant acceleration. What is the acceleration?

Question : Spotting a police car, you brake a parsche from a speed of 100kmh −1
to a speed of 80.0 kmh−1 during a displacement of 88.0m, at a constant acceleration. What is the acceleration?

(A) -2.5ms^{-2}

(B) 1.58ms^{-2}

(C) -1.58ms^{-2}

(D) 2.5ms^{-2}

Answer : option (B)

Solution :

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