Question
A ball of mass $0.2\,\text{kg}$ is thrown vertically downward from a height of $10\,\text{m}$. It collides with the floor and loses $50\%$ of its energy and then rises back to the same height. The value of its initial velocity is:
A ball of mass $0.2\,\text{kg}$ is thrown vertically downward from a height of $10\,\text{m}$. It collides with the floor and loses $50\%$ of its energy and then rises back to the same height. The value of its initial velocity is: