A bus decreases its speed from 80 km h-1 to 60 km h-1 in 5 s. Find the acceleration of the bus.

Asked by Vishal kumar | 2 years ago |  317

##### Solution :-

Given, the initial velocity (u) = 80km/hour = $$\frac{80,000m}{3600s}=22.22\,m.s^{-1}$$

The final velocity (v) = 60km/hour $$= \frac{60,000m}{3600s}=16.66\,m.s^{-1}$$

Time frame, t = 5 seconds.

Therefore, acceleration (a) $$=\frac{v-u}{t}$$ $$=\frac{16.66\,ms^{-1}-22.22\,m.s^{-1}}{5s}$$

$$=-1.112\,m.s^{-2}$$

Therefore, the total acceleration of the bus is $$-1.112\,m.s^{-2}$$. It can be noted that the negative sign indicates that the velocity of the bus is decreasing.

Answered by Vishal kumar | 2 years ago

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