h = h0+ v0* t- $$h$$ = $$h0+v0\cdot t-\frac{g\cdot t^{2}}{2}$$ h = h0+ t* v0- $$h$$ = $$h0+t\cdot v0-\frac{g\cdot t^{2}}{2}$$ h = h0+ 2* 0- $$h$$ = $$h0+2\cdot 0-\frac{10\cdot 2^{2}}{2}$$ h = h0+0- $$h$$ = $$h0+0-\frac{10\cdot 2^{2}}{2}$$ h = h0+0- $$h$$ = $$h0+0-\frac{10\cdot 4}{2}$$ h = h0+0- 5* 4$$h$$ = $$h0+0-5\cdot 4$$
h = h0+0-20$$h$$ = $$h0+0-20$$
h = h0-20$$h$$ = $$h0-20$$