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Calculate the value of $V$.
Mathematics 9709 · AS & A Level · Representation of data
Representation of data — practice question
A particle $P$ is launched from $O$ on horizontal ground with speed $V\,\text{m s}^{-1}$ at an angle of $30^\circ$ above the horizontal. After $2\,\text{s}$, the line $OP$ is inclined at $15^\circ$ above the horizontal.