Results show that scaling law parameter μ, a coefficient related to strength properties of target material which is obtained by ground experiment fitting, has a great effect on the factor. Meanwhile, the crater effect and momentum transfer factor of small bodies with different kinetic impact schemes and structural characteristics are studied. In this paper, theoretical model of momentum transfer factor in kinetic impact is investigated, as well as the influence of impactor properties and small body structure properties on the factor. I hope i answered your question.Momentum transfer factor β is the key factor to evaluate effect of kinetic impact. But its similar, and weird at the same time. We can say, that energy in the first object was transfered to the second one. This energy gained in this manner by the second object, is equal to the energy that was negated by the pushing electrons from the initial moving object. But, this force also acts in the opposite direction in which the electrons are applying force, in other words, the direction the moving object was moving in before impact. The electrons of the stable object push back against the moving object. In our terms, it loses its momentum.īut we remember from Newtons third law. So, the first object either slows down, or stops. This repulsion force is just enough to lower the velocity of the first object to levels acceptable with the principle. So, the repulsion force will have to increase to compensate the exclusion principle. Why? The faster the object, the closer the electrons will be pressed together when it strikes the stationary one. The force of repulsion is directly proportional to the speed of the moving object. The electrons in the stationary object repel the electrons in the moving one. When the moving object strikes the stationary one, the electrons come really close to one another. A better term would be, energy was induced. So, when a moving object strikes a stationary object, why was energy transfered? The truth is, energy wasnt transfered. Well, that is not the textbook definition but it would be better to imagine it as that. Due to transfer of momentum, stuff move right? So we can imagine momentum as the energy possesed by moving objetcs. That is the transfer of momentum via contact forces, which you can see and check everyday, and it happens because of Newton's second law of motion: $$\vec F= \frac \hat r$$Īnd because of the fact that matter is made of atoms with a negative electron cloud around them, making the outter surface of objects reppel.īut why and how is momentum even transferred? That is a good question. This clearly makes the moving object slow down while making the stationary object speed up. What do you mean by "how does repulsion transfer momentum?" Repulsion is a force, and force is equal to change in momentum, it is defined as $\vec F=d\vec p/dt$.Ĭonsider the simple case of two cubes colliding face to face, when one of them touches the other with velocty $\vec v$, both objects feel a force of repulsion (due to their electrons interacting via the electric force), the stationary object feels it in the direction of $\vec v$, while the other feels a repulsion in the opposite direction, but with same magnitude. As you can see in my comment to your question, momentum transfer is due to electric repulsion.
0 Comments
Leave a Reply. |