Velocity of a car depends on its distance \( \ell \) from a fixed pole on a straight road as \( ... VIDEO
Velocity of a car depends on its distance \( \ell \) from a fixed pole on a straight road as \( \mathrm{v}=2 \sqrt{\ell} \), where \( \ell \) is in meters and \( \mathrm{v} \) in \( \mathrm{m} / \mathrm{s} \). Find acceleration (in \( \mathrm{m} / \mathrm{s}^{2} \) ) when \( \ell=8 \mathrm{~m} \).
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