A moving bus is brought to rest within 30 seconds by applying brakes. What is its initial velocity, if the retardation due to brakes is 2 $m s^{- 2}$ ?

60 m s^{- 1}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

15 m s^{- 1}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

40 m s^{- 1}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

30 m s^{- 1}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $60 m s^{- 1}$
Given:
Time, $t = 30 s e c$
Retardation, $a = - 2 m / s^{2}$
Final velovity, $v = 0$
From equation of motion
$\Rightarrow v = u + a t$
$\Rightarrow 0 = u - 2 \times 30$
$\Rightarrow u = 60 m / s$

Suggest Corrections

Similar questions

A moving train is brought to rest within 20 seconds by applying brakes. Find the initial velocity, if the retardation due to brakes is 2 m/s².

2 m s^{- 1}

0.5 m s^{- 2}

20 m s^{- 1}

^{2}

Join BYJU'S Learning Program