Question

if the speed of an object decreases from 90km/hr to 80 km/hr find it acceraltion?​

Answer 1

Answer:

The acceleration of the bus is -1.12m/s.

Answer 2

Answer:

Answer: The acceleration of the bus is -1.12m/s2

Let's look into 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.

Therefore, the acceleration of the bus that decreases its speed from 80 kilometers per hour to 60 km per hour in 5 seconds is -1.12m/s2