Question

a body is at rest attaining acceleration of 4 metre per second square find its velocity at the end of a half metre​

Answer 1

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Answer 2

The velocity of the body at the end of a half meter is 2 m/s.

Explanation:

Given that,

Acceleration of the body, $a=4\ m/s^2$

Initial velocity of the body, u = 0

Distance, d = 0.5 m

Let v is the velocity of the body. It can be calculated using the third equation of motion as :

$v^2-u^2=2ad$

$v^2=2ad$

$v=\sqrt{2ad}$

$v=\sqrt{2\times 4\times 0.5}$

v = 2 m/s

So, the velocity of the body at the end of a half meter is 2 m/s.

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Topic : Equation of kinematics

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