Question

A bus decreases is speed from 80 km / hr second to 60 km / hr find the acceleration of the bus

Answer 1

this could be like this=
speed of bus decreases= 80km
second of bus =60km/hr

acceleration of bus= 60/80=6/8=0.75

Answer 2

Ans.

$u \: = 80 \: km \: {h}^{ - 1}$

$= 80 \times \frac{5}{18} m/s$

$v = 60 \: km \: {h}^{ - 1} = 60 \times \frac{5}{8} m/s$

$t = 5 \: sec$

$a =$

Now using ⬇️

$\huge \: v = u + at$

$60 \times \frac{5}{10} = 80 \frac{5}{18} + a \times 5$

$5a = (60 - 80) \times \frac{5}{8}$

$a = \frac{ - 20 \times 5}{5 \times 18}$

$a = - 1.11 \: m/ {s}^{2}$