Physics

Problem

A stone rises to a maximum height of

45\,\text{m}

when projected vertically upward. Determine its initial speed. (Take

g = 9.8\,\text{m}\,\text{s}^{-2}

.) a)

20.9\,\text{m}\,\text{s}^{-1}

42.0\,\text{m}\,\text{s}^{-1}

29.6\,\text{m}\,\text{s}^{-1}

30.0\,\text{m}\,\text{s}^{-1}