Can gravity be an external force?

Gravitational force is considered an internal force rather than an external force.

Can momentum be conserved for a system if there are external forces acting on the system?

Law of Conservation of Momentum In a closed system, the total momentum never changes. Note that there absolutely can be external forces acting on the system; but for the system’s momentum to remain constant, these external forces have to cancel, so that the net external force is zero.

Is momentum always conserved in the real world?

Generally speaking, Yes. The caveat is that there must be no external forces acting (aka the collision takes place in a closed system). These collisions are subdivided into elastic and inelastic collisions. For both total momentum and total energy (but not kinetic energy) are always conserved.

Is an gravity an internal or external force?

And for our purposes, the internal forces include the gravity forces, magnetic force, electrical force, and spring force. Because external forces are capable of changing the total mechanical energy of an object, they are sometimes referred to as nonconservative forces.

When the only external force acting on a body is caused by gravity the general motion of the body is referred to as?

In Newtonian physics, free fall is any motion of a body where gravity is the only force acting upon it.

How does gravity affect momentum?

Gravity counts as an external force if it has time to affect the momentum of the system in the direction it’s acting in. If gravity is acting downwards, it won’t affect the horizontal momentum of the system.

How momentum is conserved?

conservation of momentum, general law of physics according to which the quantity called momentum that characterizes motion never changes in an isolated collection of objects; that is, the total momentum of a system remains constant. Before launch, the total momentum of a rocket and its fuel is zero.

Why momentum is always conserved?

Impulses of the colliding bodies are nothing but changes in momentum of colliding bodies. Hence changes in momentum are always equal and opposite for colliding bodies. If the momentum of one body increases then the momentum of the other must decrease by the same magnitude. Therefore the momentum is always conserved.

What is the assumption for the conservation of momentum?

Assumption for conservation of momentum, is that no external forces act on the system. Is gravity an external force? Any other examples? – Quora Assumption for conservation of momentum, is that no external forces act on the system. Is gravity an external force?

Can there be external forces acting on a system’s momentum?

Note that there absolutely can be external forces acting on the system; but for the system’s momentum to remain constant, these external forces have to cancel, so that the net external force is zero.

When is gravity an external force?

Gravity is only an external force if either of the two masses involved in the gravitational attraction are outside of the system.

Is momentum conserved when an object is stricken?

Yes: momentum is conserved, but there is massive loss of kinetic energy. The larger the stricken object the greater the loss of energy. Highly active question. Earn 10 reputation (not counting the association bonus) in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.