The kinetic energy is zero at the start because the object is initially at rest. Since kinetic energy is given by 1/2 mv², and the initial velocity (v) is zero, the kinetic energy is also zero.
Discussion Forum Latest Questions
In both the zigzag path and the straight vertical path, the work done by gravity is the same. Even though the zigzag path is longer, the vertical height difference h between positions A and B remains constant. Therefore, the work ...
The work done by gravity is the same for both paths. It is given by mgh, where m is the mass of the block, g is the acceleration due to gravity, and h is the vertical height difference between positions ...
The reason a glass of water does not change into ice at 0°C is that to freeze the water, some amount of heat must be removed from it. Freezing occurs when water loses heat energy, causing its temperature to drop ...
Food cooks faster in a pressure cooker because the air pressure increases, which increases the boiling point of water. This higher boiling point allows the food to cook at a higher temperature, speeding up the cooking process.