Why is linear momentum conserved when the ball hits the wall?
When the ball hits the vertical wall net external force remains zero due to the presence of opposite vectors which cancels out internally, and this makes linear momentum remain conserved. Thanks for contributing an answer to Physics Stack Exchange!
Is angular momentum conserved in linear equations?
Both linear and angular momentum are conserved. Equations are equations and if they include common variables they can be combined in any way that is mathematically valid. PS remember that angular momentum is defined relative to a given point. So, you are also free to choose the point about which you measure angular momentum of the system.
Why is momentum conserved only in the horizontal direction?
The momentum of the ball of course changes and the change is equal to two times the initial momentum! The momentum conservation principle will be valid for horizontal direction. In this case,Linear momentum is conserved only in horizontal direction.Whereas, the same is not true for vertical direction.
How is momentum conserved in a perfectly elastic collision?
The momentum of the ball is not conserved at all. But if it is an perfectly elastic collision the kinetic energy will be conserved and then from (1/2)m (V^2)i= (1/2)m (V^2)f you have the two velocities equal in magnitude. The momentum of the ball of course changes and the change is equal to two times the initial momentum!
Is momentum conserved when a ball hits the ground?
conservation of momentum: The amount of momentum in a system remains the same after a collision. elastic collision: A collision in which all of the momentum is conserved. For example, a ball that bounces back up to its original height. energy: The capacity to do work.
Is the linear momentum of a ball falling freely conserved?
Linear momentum of a system remains conserved unless an external force acts on it. Since during free fall, a gravitational force acts on the body, it's momentum will not remain conserved.
How do you know if linear momentum is conserved?
A system must meet two requirements for its momentum to be conserved:The mass of the system must remain constant during the interaction. ... The net external force on the system must be zero.
Is momentum conserved when a ball hits a wall?
When the ball hits the vertical wall net external force remains zero due to the presence of opposite vectors which cancels out internally, and this makes linear momentum remain conserved.
Why is momentum not conserved in a falling ball?
The momentum of the ball is not conserved because an external force (gravity) is applied on it. The momentum of a system is conserved where there are no external forces on it.
Why is linear momentum conserved?
Conservation of linear momentum expresses the fact that a body or system of bodies in motion retains its total momentum, the product of mass and vector velocity, unless an external force is applied to it. In an isolated system (such as the universe), there are no external forces, so momentum is always conserved.
Is momentum conserved in all collisions?
In collisions between two isolated objects Newton's third law implies that momentum is always conserved. In collisions, it is assumed that the colliding objects interact for such a short time, that the impulse due to external forces is negligible.
Which is not an application of conservation of linear momentum?
Also, when a man jumps from the boat to the shore, no external force is applied. Therefore, the total momentum in this system is also conserved. Hence, none of the given applications can be said not to be an application of conservation of momentum.
Could an elephant have the same momentum as a golf ball?
For the elephant to be walking and have the same momentum as the golf ball, it has to have velocity that is 10−5 times that of the golf ball. So the elephant must be going 70×10−5ms . At that rate it would take about 23 minutes to go 1 m.
How is momentum conserved when kicking a ball?
When momentum and kinetic energy are conserved, as they are approximately conserved when kicking a football, there is no loss in momentum and energy before or after the collision. Therefore, initial momentum and energy before the collision is equal to final momentum and energy after the collision.
How is momentum conserved when a ball bounces against the floor?
The ball pushes the earth downwards while the earth pushes the ball back up. The total momentum of the ball and the earth before the collision equals the total momentum just after the collision.
Is momentum always conserved?
In an isolated system (such as the universe), there are no external forces, so momentum is always conserved. Because momentum is conserved, its components in any direction will also be conserved. Application of the law of conservation of momentum is important in the solution of collision problems.
Is the AM equation right?
The AM equation is not right. You seem to be taking the AM of the ball and the rod about different points: the ball relative to the top of the rod and the rod about its COM. Those are different points. To be clear: you must specify the point about which you are measuring the AM of the system. Dec 4, 2019.
Can equations be combined?
Equations are equations and if they include common variables they can be combined in any way that is mathematically valid. PS remember that angular momentum is defined relative to a given point. So, you are also free to choose the point about which you measure angular momentum of the system. Last edited: Dec 4, 2019.
Does a ball have initial KE?
The ball has some initial KE. The equations do not care whether it is "rotational", "linear" or something else. The ball likely has some initial angular momentum. How much will depend on what axis of rotation you choose. "Rotational kinetic energy" as such need not enter in. Dec 4, 2019.
