# Can two moving objects have a momentum of 0?

Can two moving objects have a momentum of 0? If an object is moving, its momentum cannot be zero.

How can an object have zero momentum?

1. Momentum of a body is defined as the product of its mass and velocity .
2. An object is said to have zero momentum when either the mass or the velocity is zero.
3. Since the mass of the object cannot be zero, the velocity of the object must be zero for momentum to be zero.

What happens to momentum if multiple objects are hit? The law of momentum conservation can be stated as follows. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.

Is the total momentum always zero? Reasoning: In collisions between two objects momentum is conserved. Since the initial momentum is not zero, the final momentum is not zero. Both objects cannot be at rest.

## Can two moving objects have a momentum of 0? – Additional Questions

### Why momentum is considered equal to zero when a body comes to rest?

The momentum of any object that is at rest is 0. Objects at rest do not have momentum – they do not have any “mass in motion.” Both variables – mass and velocity – are important in comparing the momentum of two objects.

### Is momentum 0 in center of mass frame?

In this frame the momentum of the system is zero. This frame is also called the center-of-mass frame. The center of mass is a coordinate that is a mass-weighted average of the positions of the objects that make up the system. In a two-object system the center of mass is always somewhere in between the two objects.

### What is the total momentum of a system?

Definition: The total momentum of a system is the sum of the momenta of each of the objects in the system. Since momentum is a vector, the techniques of vector addition discussed in This chapter must be used to calculate the total momentum of a system.

### What can you say about collisions where the total momentum is zero?

There is nothing in that statement about what happens during the collision. There is no instant during a collision in which both objects are at rest unless the total momentum is zero ( the objects come from opposite directions with equal and opposite momenta).

### Which is a necessary condition for the total momentum?

A system must meet two requirements for its momentum to be conserved: The mass of the system must remain constant during the interaction. As the objects interact (apply forces on each other), they may transfer mass from one to another; but any mass one object gains is balanced by the loss of that mass from another.

### Can you have negative momentum?

Yes, momentum can be negative. Momentum is a vector quantity that is determined by multiplying an object’s mass by its velocity. If the item’s velocity is negative, i.e., the object is moving in what has been defined as the negative direction, the momentum will be negative as well.

### Is total momentum always conserved?

Momentum is always conserved, regardless of collision type. Mass is conserved regardless of collision type as well, but the mass may be deformed by an inelastic collision, resulting in the two original masses being stuck together.

### In what case is momentum not conserved?

Momentum is not conserved if there is friction, gravity, or net force (net force just means the total amount of force). What it means is that if you act on an object, its momentum will change. This should be obvious, since you are adding to or taking away from the object’s velocity and therefore changing its momentum.

### What happens when 2 objects collide?

In a collision between two objects, both objects experience forces that are equal in magnitude and opposite in direction. Such forces often cause one object to speed up (gain momentum) and the other object to slow down (lose momentum).