Mathematics 9709 · AS & A Level · Representation of data

Representation of data — practice question

A stone is projected horizontally from the top of a vertical cliff $20\,\text{m}$ above the sea with speed $15\,\text{m s}^{-1}$. Calculate
(i)[3]

the distance between the base of the cliff and the point at which the stone enters the sea,

(ii)[3]

the speed of the stone at the instant it enters the sea.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: Applies the trajectory equation $y = -\frac{gx^2}{2u^2}$ or $20 = \frac{gt^2}{2}$ to obtain $t = 2$

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