Physics

Problem

A rock is thrown from the edge of a

20\,\text{m}

-high cliff with a speed of

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

at an angle of

35^{\circ}

above the horizontal. Ignoring air resistance, how much time elapses before the rock strikes the ground below the cliff? a)

2.0\,\text{s}

4.4\,\text{s}

3.5\,\text{s}

5.7\,\text{s}