Quick questions on Projectiles: resolving the initial velocity, range, height and time of flight - OCR A-Level Maths A

4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is a horizontal launch from a height?

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When a projectile is launched horizontally, the initial vertical velocity is zero, so the fall time comes from the height alone, and the horizontal distance follows.

What is the equation of the trajectory?

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Eliminating

t

between the horizontal and vertical equations gives

y

as a function of

x

, a downward parabola. This is useful when a question asks whether a projectile clears an obstacle at a known horizontal distance.

What is q1?

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A projectile is launched at

30

m s

^{-1}

and

60^\circ

. Find the vertical component of its initial velocity. [1 mark]

What is q2?

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A stone is thrown horizontally at

8

m s

^{-1}

and falls for

2

s. Find the horizontal distance travelled. [2 marks]

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