A ball of mass \( 0.5 \, \text{kg} \) is dropped from the height of \( 10 \, \text{m} \). The height, at which the magnitude of velocity becomes equal to the magnitude of acceleration due to gravity, is __________ \( \text{m} \). [Use \( g = 10 \, \text{m} / \text{s}^{2} \)]
