Question

A bus travelling eastwards at 60 m s-1 takes 10s to come to halt, its deceleration is equal to

Answer 1

v=u+at

0=60+a10

0=60+10a

-60=10a

a=-6

Answer 2

Given that,

Initial velocity of a bus, u = 60 m/s

It comes to halt, final velocity, v = 0

Time, t = 10 s

To find,

Deceleration of the bus.

Solution,

The change in velocity per unit time is called called acceleration of an object. If final speed is less than that of initial speed, it will have deceleration. It is given by :

$a=\dfrac{v-u}{t}\\\\a=\dfrac{0-60}{10}\\\\a=-6\ m/s^2$

So, the deceleration of the bus is $6\ m/s^2$.

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