A car starts from rest and attains a speed of $80 m s^{- 1}$ in $4 s$ . Find the acceleration of the car.

$10 m s^{- 2}$

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

$20 m s^{- 2}$

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

$12 m s^{- 2}$

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

$15 m / s^{2}$

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

Open in App

Solution

The correct option is B
$20 m s^{- 2}$

Here,
initial velocity, $u = 0$
final velocity, $v = 80 m s^{- 1}$
time, $t = 4 s$
Using $v = u + a t$ ,
$80 = 0 + 4 a$
$\Rightarrow$ Acceleration, $a = \frac{80}{4} = 20 m s^{- 2}$

Suggest Corrections

Similar questions

What is the acceleration of a car that starts from rest and attains a speed of $20 m s^{- 1}$ in 25 seconds?

20 m s^{- 1}

25 s

What is the acceleration of a van that starts from rest and attains a velocity of $20 m s^{- 1}$ in $25$ seconds?

500 m s^{- 1}

m s^{- 1}

Join BYJU'S Learning Program