Question

A Bus was moving a speed of 54 km/ h. on applying brakes it stopped in 8 second . calculate the acceleration​

Answer 1

Answer:

A Bus was moving a speed of $54km/h$ on applying brakes it stopped in $8s$ the acceleration​ of the bus is $1.8m/s^{2}$

Explanation:

The speed is the rate of change of distance by time if there is a change in velocity with respect to the time it is called acceleration.

From the question, it is given that speed of the bus is $V=54km/h$

To convert $km/h$ to $m/s$ we need to multiply it with $5/18$ so

speed of the bus is $V=54*5/18=15m/s$

after applying the brake the bus is stopped, the time taken to stop the bus is

$t=8s$

now the acceleration is  $a=v/t$

substituting the given values we get,

$a=15/8=1.8m/s^{2}$