A glass ball is dropped from a height 10 m .if there is 20% loose of energy due to impact then after one impact the ball will be up to m is

视频信息

答案文本 复制

视频字幕 复制

We have a glass ball dropped from a height of 10 meters. When it hits the ground, 20 percent of its energy is lost due to the impact. We need to find how high the ball will bounce back after this energy loss. Let's start by calculating the initial energy of the ball. When the ball is at a height of 10 meters, it has potential energy equal to m g h initial, where m is the mass, g is the acceleration due to gravity, and h initial is 10 meters. During the impact with the ground, the ball loses 20 percent of its energy. This means only 80 percent of the original energy remains. So the energy after impact equals 0.80 times the initial potential energy.