Speed is the rate at which an object moves. It is typically measured in units of distance per unit of time, such as meters per second or kilometers per hour.
The speed of an object can be calculated by dividing the distance traveled by the time it took to travel that distance. The formula for speed is speed = distance / time.
Speed and velocity are often used interchangeably, but they have distinct meanings. Speed is the rate of motion, while velocity is the rate of motion in a specific direction. Velocity also takes into account the object's displacement, or change in position, whereas speed does not.
The speed of the second ball after a collision can vary depending on the type of collision and the properties of the two objects involved. In an elastic collision, where there is no loss of kinetic energy, the speed of the second ball will be equal to the speed of the first ball before the collision. In an inelastic collision, where there is some loss of kinetic energy, the speed of the second ball will be less than the speed of the first ball.
The speed of the second ball after a collision can be affected by a number of factors, such as the mass and velocity of the two objects, the type of collision, and any external forces acting on the objects. The angle at which the two objects collide can also impact the speed of the second ball.