# A ball is projected horizontally with a velocity of $$ 5ms^{-1} $$ from the top of a tower of height 10 m. When it reaches the ground ( $$ g = 10 ms^{-2} $$ )

**A**

The horizontal component of its velocity is $$ 14 ms^{_1} $$

**B**

Its velocity is $$ 15ms^{_1} $$

**C**

Its velocity is $$ \frac{29}ms{_1} $$

**D**

Vertical component of its velocity is $$ 15ms^{-1} $$

#### Correct option is A. Vertical component of its velocity is $$ 15ms^{-1} $$

$$ V = \sqrt{2gh} = \sqrt{2 \times 10 \times 10}$$

$$ Vy = 10\sqrt{2} $$

$$ Vx = 5 m/s $$ same

$$ V = \sqrt{Vx^{2} + Vy^{2}} $$

$$ = \sqrt{200 + 25} $$

$$ = \sqrt{225} $$

$$ = 15 $$