Hello,Originally Posted by tnkfub
the stone starts at a height of 63 m. Then it is loosing height by being tossed and by falling, until it hits the ground, that means the height is zero(0).
This is a quadratic equation in t. I suppose that you know how to solve a quadratic equation.
The negative solution isn't very realistic.
In comparison: If the stone were only fallen down, it had taken 3.58 s to come down. So the tossing gave the extra kick.