Mathematics 9709 · AS & A Level · Probability

Probability — practice question

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A particle is projected at speed $20\text{ m s}^{-1}$ at an angle of $60^\circ$ above the horizontal. Calculate the time after projection when the particle is descending at an angle of $40^\circ$ below the horizontal.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Applies $\tan 40^\circ = \dfrac{v}{20\cos 60^\circ}$” …

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