Question

a particle is projected horizontally with Speed 2√gH from tower of height 2H . the horizontal velocity of particle when it hits the ground is?
options
1. √8gH
2. √4gH
3. √2gH
4. √gH​

Answer 1

A particle is projected horizontally from the top of a tower with a velocity of 2√gH. Also, of the tower is given as 2H.

Now, we know that :

• Acceleration i.e. gravity acts only in the Y axis.

• This means that : only the velocity in the Y axis will undergo changes due to gravitational acceleration.

• However, the initial velocity (which was given in X axis) will remain constant because there is no acceleration present in the X axis.

So, final horizontal velocity after particle touches the ground will remain as 2√gH or √(4gh).

$\star$ Option 2) is correct ✔️.