Momentum is a measure of an object's motion and is calculated by multiplying its mass by its velocity. It is a vector quantity, meaning it has both magnitude and direction.
After hitting a wall, the momentum of an object changes because its velocity changes. The object's momentum will decrease if it bounces off the wall, while it will increase if it sticks to the wall. In either case, the direction of the momentum will change to be in the opposite direction of the object's motion before hitting the wall.
The law of conservation of momentum states that in a closed system, the total momentum of all objects before a collision is equal to the total momentum of all objects after the collision, as long as no external forces are acting on the system. This means that momentum is conserved, or stays the same, during collisions.
The mass of an object directly affects its momentum after hitting a wall. The larger the mass, the greater the momentum. This is because momentum is directly proportional to mass, meaning that if the mass doubles, the momentum also doubles.
Yes, the momentum of an object can be negative. This occurs when the direction of the object's velocity is opposite to the direction of its initial momentum. This can happen, for example, when an object bounces off a wall and moves in the opposite direction.