No.
Consider a grain of rice and a banana. If you threw these at someone so that they were moving at the same speed, their velocities would be the same.
However, you would hardly feel the impact of the grain of rice but the banana would hurt.
The force of the impact is a measure of the relative inertia of the two objects.
Where two objects are traveling at the samevelocity, the inertia is greater in that object that has the greatest mass.
Inertia is directly proportional to mass. Unless you mean rotational inertia, in which case it depends on the shape, but for two objects of the same shape (and mass distribution), the more massive always has higher inertia.
No. Inertia is the tendency of an object to maintain its velocity.
Inertia resists the change in its motion/ velocity, and is proportional to its mass.
Different velocities is what causes objects to have the same mass and different amounts of inertia. This can be written in a formula.
Force and inertia are not the same. They are quite different. They do both have a relationship to the motion of objects having mass.
In the same direction. Both momentum and velocity are vectors.
As you can observe, they will not ALWAYS be at rest. Objects have a tendency to remain at rest, because:* Inertia means that if no force acts on an object, it will remain at rest if it was at rest; or, if it was moving, it will continue moving at the same velocity. * Friction forces will usually slow objects down.
an acceleration of Zero, and a constant Inertia.
an acceleration of Zero, and a constant Inertia.
Inertia is the tendency of an object to resist any change in its motion.Two objects with the same mass and same velocity will both have the same amount of inertia. However, if they have different velocities, they will have different amounts of inertia.Consider two trains, one moving at 100 kilometers per hour, and the other moving at 120 kilometers per hour. If they both brake at the same time, the slower one will come to a stop sooner than the faster train, because the faster train has more inertia and can resist more friction than the slower train.
Newtons First Law of Motion states that an object with a given momentum will continue to posses that same momentum until the object is acted on by a force in which case it will undergo a change in momentum. Inertia is a measure of an objects tendency to resist a change in momentum. Massive bodies have a large inertia. If a massive body is in motion its momentum is given by the product of the mass and the velocity of that body. Newtons first law says that if a force acts on this body its momentum will change. But since the body has a large inertia this change is small. For example, if a small space pebble collides with a large asteroid that has a constant velocity and thus constant momentum, the force is small relative to the inertia of the asteroid so the momentum only changes a little bit.
All objects do not travel at the same velocity. As an example, you should take a few minutes and think about an earthworm and a jet airliner.