Physics

Problem

A ball is thrown vertically upward with a speed of

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

. a. (i) Find the speed of the ball when it has risen to a height of

12\,\text{m}

above the point of projection. Take

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

. b. (ii) Determine the maximum height attained by the ball from the point of projection.