اختبار إلكتروني: Linear Momentum Conceptual - inspire

Linear momentum is a fundamental physical quantity defined as the product of an object's mass and its velocity. As a vector quantity, it has both magnitude and direction. According to the law of conservation of momentum, the total momentum of an isolated system remains constant if no external forces are applied. This principle is vital in analyzing collisions, which are broadly classified as elastic, where kinetic energy is conserved, or inelastic, where kinetic energy is transformed into other forms of energy. In a completely inelastic collision, the interacting objects stick together and move with a common final velocity. Practical safety features in vehicles, such as crumple zones, utilize the concepts of impulse and momentum by increasing the duration of a collision to reduce the impact force acting on the occupants.