(i)[2]
Determine $\theta$.
(ii)[4]
Calculate the time after projection when the particle is moving at an angle of $20^\circ$ below the horizontal.
Mathematics 9709 · AS & A Level · Probability
Probability — practice question
From a position on level ground, a particle is launched at speed $15\,\text{m s}^{-1}$ at an angle of $\theta^\circ$ above the horizontal. It lands back on the ground $2\,\text{s}$ later.