Physics

Problem

A projectile launched from ground level returns to the same level after travelling

120\,\text{m}

horizontally. During its flight it rises to a maximum height of

20\,\text{m}

. Take

g = 10\,\text{m}\,\text{s}^{-2}

. Estimate the initial speed and the angle of projection. a)

35\,\text{m}\,\text{s}^{-1},\;45^{\circ}

36\,\text{m}\,\text{s}^{-1},\;34^{\circ}

24\,\text{m}\,\text{s}^{-1},\;56^{\circ}

45\,\text{m}\,\text{s}^{-1},\;18^{\circ}