How long does it take for a bus to get under way with an acceleration of 0.3 m / s to reach a speed of 54 km / h.
| July 20, 2021 | education
These tasks: the bus was moving from a standstill (V0 (initial speed) = 0 m / s); a (bus acceleration) = 0.3 m / s2; V (speed that the bus must acquire) = 54 km / h (15 m / s).
The duration of the bus acceleration to a given speed is determined from the formula: V = V0 + a * t = 0 + a * t and t = V / a.
Calculation: t = 15 / 0.3 = 50 s.
Answer: The bus will accelerate to a speed of 54 km / h in 50 seconds.
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