apply the concept of momentum to compare a slow-moving train and a high-speed bullet.?

Question

I know p=mv but still don't totally understand.

Answer 1

Momentum can be thought of as the "amount of movement" a body has. Now do the following: imagine the whole train is made of millions of bullets. If the train moves slowly, then each bullet has a very low momentum, because they have low mass and low velocity, so p=mv is a very small number. But if you think the train is made of millions of bullets, and each bullet's momentum is m*v, then the sum of all momentums is not so small.
On the other hand, if we have a single bullet, it will have a very little amount of movement at low speeds, but bullets usually move at very high speeds, so if we look at p=mv again, we have a rather large number, maybe similar with the momentum of the train moving slowly.

Answer 2

When thinking about momentum, both the mass and velocity are variables. So, a small object moving at a very high speed can have a higher momentum than a large object moving very slowly. The train and bullet are totally opposite ends of the spectrum mass-wise. But if the train is barely moving, covering only a few centimeters in an hour, a bullet could theoretically have more momentum if it is going very fast.

Answer 3

As First regulation statesEvery merchandise in a state of uniform action has a tendency to proceed to be in that state of action except an exterior rigidity is utilized to it.whilst the 2nd the relationship between an merchandise's mass m, its acceleration a, and the utilized rigidity F is F = ma. Acceleration and rigidity are vectors (as indicated via their symbols being displayed in slant formidable font); in this regulation the direction of the rigidity vector is the comparable because of the fact the direction of the acceleration vector. 2.for each action there is an equivalent and opposite reaction that is why 2 billard balls flow in comparable speed as that is hit @ the comparable speed billard ball whichs makes it comparable speed. sorry 3,4,5 not sure

Answer 4

weight and velocity are inversely related, meaning if m goes up, v goes down, and vice versa, if p stays constant. if a train weighing 5000kg is going 5m/s, it would have the same momentum as a bullet weighing 5kg going 5000m/s.(large bullet i know, but its an example).