Question

A bus decreases its speed from 72km/h to 54km/h in five second find the acceleration of the bus

Answer 1

Hi.

Good question and Be Brainly.

Here is your answer---

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Initial speed(u) = 72 km/hr.
                        = 72 x (5/18) m/s    [ Changing into m/s]
                        = 20 m/s

Final Speed(v) = 54 km/hr
                        = 54 x (5/18)m/s.   [ Changing into m/s]
                        = 15 m/s.

Time(t) = 5 s.

Using the Formula,
     acceleration = (v - u)/t
                      a = (20 - 15)/5
                      a = 5/5
                      a = 1 m/s.
                 --------------------
Thus, acceleration produces by the bus is 1 m/s.
                                                                

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Hope it helps.

Have a nice day.