PH-2389

Conservation of energy

Physics · Secondary 4 · Hard · Conservation of energy

A 0.25 kg ball is dropped from rest from a height of 8.0 m. Ignore air resistance. Using conservation of energy, what is the speed of the ball just before it hits the ground? Take

g = 10\,\text{m s}^{-2}

$9.0\,\text{m s}^{-1}$
$11\,\text{m s}^{-1}$
$13\,\text{m s}^{-1}$
$16\,\text{m s}^{-1}$

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