Question

A bus moving along a straight line at 20 m/s undergoes an acceleration of 4 metre per second square.After 2 seconds ,its speed will be:

Answer 1

$using \: first \: equation \: of \: motion \: \\ v = u + at$

where

v=final velocity

u=initial velicity

a=acceleration

t=time

v=20+4(2)

v=20+8

final velocity=28m/s

Answer 2

Hello!

A body moving along a straight-line at 20 m/s undergoes an acceleration of 4 m/s² after 2 seconds. What will be its speed also find displacement ?

* What will be its speed, we have the following data:

u (initial velocity) = 20 m/s

v (final velocity) = ? (in m/s)

t (time) = 2 s

a (acceleration) = 4 m/s²

We apply the data to the formula of the hourly function of the velocity, let us see:

(v - u)/t

                 4 = (v - 20)/2

          v - 20 = 4 × 2

               v = 20 + 8

               v = 28 m/s.

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Hope it helps.

Have a nice day.