Question

3. A bus increases its speed from 22.2 m/s to 16.6 m/s in 5 seconds. Find the acceleration of the bus. ​

Answer 1

Answer:

-1.12m/s2

Explanation:

The acceleration of the bus is -1.12m/s2

Let us understand the relationship between acceleration, speed and time.

Explanation:

Acceleration a = (V - U) / t

Given: Initial velocity (U) = 80 km/hr = 80 × 5/18 = 400/18 = 22.2 m/sec

Final velocity (V) = 60 km/hr = 60 × 5/18 = 300/18 = 16.6 m/sec

Acceleration a = (V - U) / t

= (16.6 - 22.2)/5

= -5.6/5

= -1.12 m/s2

Negative sign indicates that the velocity is decreasing.