Question

A ball is thrown horizontally from a height of $100\, m$ with an initial speed of $15\,m \,s^{-1}$ . How far does it travel horizontally in the first $2$ seconds ?

• A. $3\,m$
• B. $7.5\,m$
• C. $30\,m$
• D. $0.3\,m$

Answer 1

Answer: (C)

$30\,m$

Answer 2

$v_{x} =15\,m\,s^{-1}, t=2\,sec$
Horizontal displacement, $dx=v_{x}$.
$t=15\times 2$
$=30\,m$