Hello,Originally Posted bytnkfub

the stone starts at a height of 63 m. Then it is loosing height by being tossedandby 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.

You'll get

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.

Greetings

EB