Question

For a freely falling body the vertical velocity at the fifth second is

Answer 1

Given :

A body is freely falling .

To Find :

The vertical velocity at fifth second .

Solution :

We know , for a freely falling body .

Initial velocity ,  and acceleration is  .

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

v=u+gt

v=0+9.8 x 5

∴v=49m/s

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

Answer 2

FINAL VELOCITY IS 49 m/s.

Given:

• Object is freely falling.

To find:

Velocity at 5th second ?

Calculation:

Since , the question says that the object is freely falling under gravity, it means that the initial velocity is zero and acceleration is equal to g (i.e. 9.8 m/s²)

Applying EQUATIONS OF KINEMATICS:

$v = u + at$

$\implies \: v = 0+ gt$

$\implies \: v = gt$

$\implies \: v = 9.8 \times 5$

$\implies \: v = 49 \: m {s}^{ - 1}$

So, velocity at 5th second is 49 m/s.