Physics

Problem

Stone P is projected horizontally with a speed of

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

from the top of a cliff

20\,\text{m}

high. At the same instant, stone Q is projected horizontally with a speed of

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

from another cliff so that both stones take equal times to reach the ground. What is the height of the second cliff? (Take

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

.) a)

40\,\text{m}

20\,\text{m}

10\,\text{m}

34\,\text{m}