Question

A football is kicked at ground level in such a way that its initial horizontal speed is
12 m/s and its initial vertical speed is 17 m/s. Assume a level playing field and ignore air
resistance. (a) How much later does the football hit the ground? (b) How far away does it land?

Answer 1

Answer on Question #62296-Physics-Mechanics

A football is kicked at ground level in such a way that its initial horizontal speed is $12\mathrm{m/s}$ and its initial vertical speed is $17\mathrm{m/s}$. Assume a level playing field and ignore air resistance.

(a) How much later does the football hit the ground?

(b) How far away does it land?

Solution

(a)

$$v_f - v_i = at$$ $$t = \frac{-17 - 17}{-9.8} = 3.5\ \mathrm{s}.$$

(b)

$$x = 12(3.5) = 42\ \mathrm{m}.$$

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