Question

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Answer 1

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Answer 2

Answer:

175m

Explanation:

Acceleration = Change in velocity / Time

                    = v - u / t

72km/h = 72 × 5 / 18 m/s = 20m/s

54km/h = 54 × 5 / 18m/s  = 15m/s

    Acceleration = 20-15 / 10 

                          = 5 /10 

                          = 0.5 m/s²

To find distance we use the formula 

             v² = u² + 2aS   here v is the final velocitiy (72km/h)

                                             u is the initial velocity(54km/h)

                                              a is the acceleration

                                             S is the distance

            20² = 15² + 2 × 0.5 × S 

            400 = 225 + 1×S

            400 - 225 = S

          S = 175 m

Therefore distance = 175m

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