(i)[2]
Find the value of $\theta$.
(ii)[4]
Calculate the time after projection when the particle is travelling $20^\circ$ below the horizontal.
Mathematics 9709 · AS & A Level · Representation of data
Representation of data — practice question
A particle is launched from a point on horizontal ground with speed $15\,\text{m s}^{-1}$ at an angle of $\theta^\circ$ above the horizontal. It lands on the ground $2\,\text{s}$ after launch.