Question

A bus decreases its velocity from 20 m/s to 10 m/s in 5 seconds. The acceleration of the

I. 4 m/second

II. -2 m/second square

III. 2 m/second square

IV. -2 m/second​

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Answer 1

Answer:

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Given :-

A bus decreases its velocity from 20 m/s to 10 m/s in 5 seconds.

To Find :-

Acceleration

Solution :-

According to the first equation of motion

v = u + at

10 = 20 + a(5)

10 - 20 = a(5)

-10 = 5a

-10/5 = a

-2 = a

Answer 2

The acceleration of the bus is –2 m/s². When the velocity is decreasing, the acceleration is regarded as retardation.

Step-by-step explanation:

So,IV is correct