With what average acceleration did the bus move if the speedometer readings changed from 18 to 72 km / h

With what average acceleration did the bus move if the speedometer readings changed from 18 to 72 km / h in a time of 1 minute?

Initial data: t (duration of the bus movement) = 1 min (60 s); V1 (initial speed reading on the speedometer) = 18 km / h (5 m / s); V2 (final speed reading) = 72 km / h (20 m / s).

The average acceleration with which the bus was moving can be determined by the formula: arr. = (V2 – V1) / t.

Calculation: arr. = (20 – 5) / 60 = 0.25 m / s2.

Answer: The bus was moving with an average acceleration of 0.25 m / s2.