How is momentum related to inertia

Related questions Question ce Question 13b3d. If the velocity of an object doubles, does its momentum double? How can an impulse exerted on something be increased?

How is impulse related to momentum? What are the units for impulse? Could an elephant have the same momentum as a golf ball? For example, an elephant has no momentum when it is standing still. When it begins to walk, it will have momentum in the same direction as it is travelling. The faster the elephant walks, the larger its momentum will be. Momentum can be calculated using the equation:. This is when:. A lorry has a mass of 7, kg.

Calculate the momentum of the lorry. Calculate the momentum of the skater. In a closed system:. A 'closed system' is something that is not affected by external forces. These collisions, if not perfectly elastic, will reduce the Kinetic Energy of the system, especially if they clump together into a single object, but the Momentum of the clump will be the same as the net momentum of all the original individual pieces -- the Center of Mass will continue to move with the same Net Velocity.

While Total Energy is conserved first law of thermodynamics , Kinetic Energy can shift into other forms such as Thermal Energy or Potential Energy, so it is not conserved like Momentum. As an important caveat, the above applies to the realm of classic Newtonian physics where velocities are much, much less than the speed of light speed of information and relativistic effects are negligible.

As objects approach the speed of light, velocity and mass are not so distinct, and additional energy appears to the observer to increase the mass of an object rather than its velocity. Still, momentum is conserved. Inertia is what we simply called 'quantity of material'. The word material has been used here to specify the matter of body. For example, a plastic chair, a wood chair and an iron chair.

Among them, a plastic chair will have less inertia because it will apply less reaction force, so it is easy to lift it. And the word quantitative is used to define the number. For example, a 10 kg wood and 10 kg iron would have same inertia. So we basically define inertia and momentum like this: the tendency of body to oppose the external force applied to change the shape size or position of body is inertia and the quantity of motion is called momentum.

Mark the word external force. There are good answers here already, but none of them seem to have addressed what you said about being told that momentum is a resistance of change of motion. That statement could be accurate, if you jump through a couple hoops in how you interpret it. Inertia is an antiquated historical term, and it is not amusing to read tortured attempts to obscure that fact that its meaning is indistinguishable from the property of matter we now call inertial mass, which--in classical physics--is resistance to acceleration.

Mass is erroneously defined in many books and many classrooms, especially in chemical science, as "the amount of 'stuff,' or the amount of matter in an object. Do yourself a favor and unlearn any notion you may have that mass is matter.

Mass is not matter; it is a property of matter. Inertia is an outdated, unitless, useless, and confusing synonym for inertial mass. I have thrown it out of my personal physics lexicon. I'm a physics teacher and I don't teach inertia except as a historical artifact we have to endure where we find it still in use.

I just nod and smile I encounter it in print, or in conversations where argument about it is not warranted. Momentum is the product of an object's mass and velocity, a quantity which Newton considered to be the fundamental quantity of motion. From an outsiders perspective, I see inertia as the state of the matter, and momentum as measurement of that state. Inertia can be a state of non movement or extreme speed.

The rate at which this movement or non movement is allowed to continue is momentum. That is why momentum can be measured but inertia can only be observed. One of the first intriguing thoughts I had in physics is how can a small particle at high speed like a bullet do the big damage of a much bigger mass.

What is the connection that makes speed a substitute for mass. It turned out that this is in fact, the most important question of the whole of physics.

It is momentum that is at play here of course, which I consider to be the pillar of physics and the universe at the same time!! But how momentum that is intangible be related to mass which is very tangible so to speak.

But this is energy and mass with no momentum. Well, mass and momentum are related- since the integral along a line of p. The resistance offered by a body to change in its state of rest. This means the body remains at rest and cannot start moving on its own. The resistance offered by the body to change its state of uniform motion.

This means the body is in uniform motion and can neither be accelerated nor retarded on its own, eventually comes to rest. Inertia of Direction. The resistance offered by a body to change in its direction of motion along the straight line.

This means the body continues to traverse a linear path until some external force changes its direction of motion. Inertia Examples. The real-life examples of inertia at rest are outlined hereunder:. Place a coin on a smooth piece of cardboard covering the jug. Strike the cardboard piece with your finger suddenly. The cardboard slides and the coin falls into the jug. This happens on account of the inertia of rest.

Inertia of Motion.