Question

a bus decrease its speed from 160km/h to 120km/h in 10 s.Find the acceleration of the bus​

Answer 1

Answer:

1.11ms^-2

Explanation:

first you have to convert kilo meters per sec to meters per sec

use this fraction

$\frac{5}{18}$

therefore we get

$160kmh^{ - 1} = 44.4ms^{ - 1} \\ 120kmh^{ - 1} = 33.3ms^{ - 1}$

then use

$v = u + at \\ 33.33 = 44.44 + 10a \\ 33.33 - 44.44 = 10a \\ \frac{11.11}{10} = a \\ 1.11ms ^{ - 2}$