Got stuck on this problem, would appreciate some help.(adsbygoogle = window.adsbygoogle || []).push({});

Problem: A rock is kicked horizontally at 15 m/s from a hill with a 45 deg slope.

How long does it take for the rock to hit the ground?

The book gives the answer in the back as 5.1 sec but I don't understand how

it gets this answer.

Thanks for any help.

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# Projectile Problem

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