A force of 20 N acting on a body of mass 10 kg is found to double its velocity in 8 s. Find its initial velocity.

$4 m s^{- 1}$

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

$8 m s^{- 1}$

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

$32 m s^{- 1}$

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

$16 m s^{- 1}$

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

Open in App

Solution

The correct option is D
$16 m s^{- 1}$

$F = m a$
$20 = 10 (\frac{v - u}{t})$
$2 = \frac{2 u - u}{8} ∵ v = 2 u$
$u = 16 m / s$

Suggest Corrections

Similar questions

F = x^{3} - 3 x

A body has an initial velocity of $4 m s^{- 1}$ and deceleration of $4 m s^{- 2}$ , then what is its final velocity after travelling 2 m?

A body has an initial velocity 4 $m s^{- 1}$ and its final velocity is 1 $m s^{- 1}$ , then what is the acceleration after traveling 2m?

An object starts from rest and attains a uniform acceleration of $4 m s^{- 2}$ . What will be its velocity at the end of half a metre?

Join BYJU'S Learning Program