Acceleration is defined as the rate of change of velocity. In the given scenario, the bus accelerates at a rate of 25 m/s over a period of 10 seconds. To calculate the acceleration, we can use the formula:
Acceleration = (Change in velocity) / (Time taken)
The change in velocity is given as 25 m/s, and the time taken is 10 seconds. Plugging these values into the formula, we get:
Acceleration = 25 m/s / 10 s = 2.5 m/s²
So, the acceleration of the bus is 2.5 m/s² during the 10-second acceleration phase. After that, when the bus moves at a constant velocity, the acceleration is zero.