Question

A bus moving along a straight line at 20 m per second undergoes acceleration of 4 metre per second square after 2 second is speed will be

Answer 1

Hi.

Here is your answer---

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Given---

Initial Velocity(u) = 20 m/s.
Time(t) = 42 seconds.
Acceleration(a) = 4 m/s²

Let the Final Velocity be v m/s.

Using the Formula,

 Acceleration = (v - u)/t
                  4 = (v - 20)/2
           v - 20 = 4 × 2
                v = 20 + 8
                v = 28 m/s.

Thus, the Final Speed of the Bus after 2 seconds will be 28 m/s.

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Hope it helps.

Have a nice day.

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:

Vi (initial velocity) = 20 m/s

Vf (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:

$V_f = V_i + a*t$

$V_f = 20 + 4*2$

$V_f = 20 + 8$

$\boxed{\boxed{V_f = 28\:m/s}}\Longrightarrow(final\:velocity)\:\:\:\:\:\:\bf\green{\checkmark}$

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$\bf\red{I\:Hope\:this\:helps,\:greetings ...\:Dexteright02!}$