Question

a bus decreases its speed from 80km/h to 60km/h in 2h.find the accelration of the
bus.

Answer 1

Answer:

$accerleration = \frac{change \: in \: velocity}{time \: taken} \\ \\ = \frac{80 - 60}{2} \\ \\ = 20 \frac{km} { {hr}^{2} }$

hope it helps..

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Answer 2

Initial speed of the bus, u = 80 km/h

Final speed of the bus, v = 60 km/h

Time take to cover the distance, s = 2 h

• $\sf a_{bus}$ = $\dfrac{∆v}{t}$

• $\sf a_{bus}$ = $\dfrac{60-80}{2}$

• $\sf a_{bus}$ = $\dfrac{-20}{2}$

• $\sf a_{bus}$ = -10 km/h²

• $\sf a_{bus}$ = -2.78 m/s²

$\bold{Hope\;it \; helps\;!}$