A stone is dropped from a height of 10m on an unknown planet having g=20m/s. calculate the speed of the stone when it hits the surface of the planet. also calculate the time it takes to fall through the height.
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https://www.meritnation.com/ask-answer/question/a-stone-is-dropped-from-a-height-of-10m-on-an-unknwon-planet/gravitation/8194615