Answer:
Step-by-step explanation:
The acceleration of an object (in this case, a bus) can be calculated by finding the difference between its final velocity (V) and initial velocity (U), and dividing that difference by the time it takes for the change to occur (t).
In this specific example, let's convert the initial velocity (U) of the bus from kilometers per hour (km/hr) to meters per second (m/sec) by multiplying it by 5/18. This gives us a value of 22.22 m/sec. Similarly, the final velocity (V) is converted to 16.67 m/sec.
Using the formula for acceleration (a = (V - U) / t), we substitute the values:
a = (16.67 - 22.22) / 5
Simplifying this equation, we get:
a = -5.55 / 5
This results in an acceleration of -1.11 m/s². The negative sign indicates that the velocity of the bus is decreasing.
Therefore, the acceleration of the bus, as it decreases its speed from 80 kilometers per hour to 60 kilometers per hour in 5 seconds, is approximately -1.11 m/s².