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selssk

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**1.**A stone is thrown vertically downwards from the observation deck of the CN Tower, 400 m above the ground, with a velocity of 12 m/s [down].

A) How long will it take the stone to reach the ground ?

B) How fast will it be going when it hits the ground ?

I just got into physics, so I’m not that much familiar with the type of equation I should use. I’ve been trying to solve this problem for a while, so any help is appreciated ^^