# Which law states that in the absence of outside forces the total momentum of objects they interact with does not change?

## Which law states that in the absence of outside forces the total momentum of objects they interact with does not change?

The law of conservation of momentum states that, in the absence of outside forces like friction, the total momentum of objects that interact does not change.

What would happen to an object if no outside forces act on it?

Understand that we are saying if no outside force is applied, the velocity of the object (which is its speed and direction) will remain constant. Then, when the force is applied, the velocity will change, and the object experiences an acceleration. Several forces can act at once on the object.

What happens to the total momentum of a system during an interaction when there are no net forces?

Momentum is conserved when the mass of the system of interest remains constant during the interaction in question and when no net external force acts on the system during the interaction.

### What forces act on the outside of an object?

Friction is the force between an object in motion and the surface on which it moves. Friction is the external force that acts on objects and causes them to slow down when no other external force acts upon them.

What never changes when two or more bodies collide?

Answer: FALSE – Two colliding objects will only experience the same velocity change if they have the same mass and the collision occurs in an isolated system. It is momentum which is conserved by an isolated system of two or more objects. TRUE – Two colliding objects will exert equal forces upon each other.

How does momentum change in free fall?

When an object is experiencing free fall, it has a constant acceleration and hence an increasing velocity (neglecting friction). Thus its momentum is increasing.

#### Can an object move if there is no force acting on it?

An object with no net forces acting on it which is initially at rest will remain at rest. If it is moving, it will continue to move in a straight line with constant velocity. Forces are “pushes” or “pulls” on the object, and forces, like velocity and acceleration are vector quantities.

In what situations 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 never changes when two objects collide in the absence of external forces?

In the absence of external forces, the total momentum of a system is not altered by a collision. However, the momentum of an individual object is altered as momentum is transferred between colliding objects. g. TRUE – Momentum is calculated as the product of mass and velocity.