A football is kicked from ground level with an initial speed of and returns to the…

PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A football is kicked from ground level with an initial speed of 20 m s−120\,\text{m s}^{-1} and returns to the same level after travelling a horizontal distance of 30 m30\,\text{m}. Take g=9.8 m s−2g = 9.8\,\text{m s}^{-2}. (i) Calculate the possible angle(s) of projection. (ii) For each angle obtained in (i), compute the corresponding maximum height reached by the football.

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