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  4. 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 ?

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Q. 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 ?

J & K CETJ & K CET 2018Motion in a Plane

Solution:

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