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Finding Average Velocity

Find the rati...

Question

Find the ratio of the distance moved by a free-falling body from rest in fourth and fifth seconds of its journey.

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Solution

$S_{n} = \frac{1}{2} a (2 t - 1) \frac{S_{4}}{S_{5}} = \frac{2 \times 4 - 1}{2 \times 5 - 1} = \frac{7}{9}$

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