Question

For a freely falling body,find the vertical velocity at fifth second .

Answer 1

u =0 and a=g as it is a freely falling body then

Answer 2

Given :

A body is freely falling .

To Find :

The vertical velocity at fifth second .

Solution :

We know , for a freely falling body .

Initial velocity , $u = 0\ m/s$ and acceleration is $a=g=9.8\ m/s^2$ .

So , velocity at t = 5 s is given by equation of motion :

$v=u+gt\\v=0+9.8\times 5\\v=49\ m/s$

Therefore ,  the vertical velocity at fifth second is 49 m/s .

Learn More :

Kinematics

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