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>> $A ball is projected horizontally with a$

Question

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

A

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

B

The horizontal component of its velocity is $14 m s^{_{1}}$

C

Its velocity is $15 m s^{_{1}}$

D

Its velocity is $\frac{2 9}{m} s_{1}$

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Solution

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Correct option is A)

$V = 2 g h = 2 \times 10 \times 10$
$V y = 102$
$V x = 5 m / s$ same
$V = V x^{2} + V y^{2}$
$= 200 + 25$
$= 225$
$= 15$

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