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Newtonian Mechanics

Quick questions on Projectile motion explained: H2 Physics Newtonian Mechanics

6short 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 resolving the launch velocity?
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For a launch speed uu at angle θ\theta above the horizontal:
What is horizontal range?
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The range is the constant horizontal velocity multiplied by the time of flight:
What is the effect of air resistance?
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Real projectiles meet air resistance, which acts opposite to velocity. The path becomes asymmetric: the range and maximum height are reduced, the descent is steeper than the ascent, and the projectile lands at a steeper angle and lower speed than it launched. The trajectory is no longer a true parabola.
What is q1?
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State why the horizontal velocity of a projectile (with air resistance neglected) is constant. [2 marks]
What is q2?
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A projectile is launched at 18 m s−118\ \text{m s}^{-1} at 50∘50^\circ above the horizontal from level ground. Find its time of flight. [2 marks]
What is q3?
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Describe how the trajectory of a real projectile differs from the ideal parabolic path, and explain why. [3 marks]

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