# Tag Info

## New answers tagged collision

### Are faster or heavier objects in motion difficult to slow down due to kinetic energy or inertia?

The answer depends on your definition of "difficult" when modifying "slowing down". You are framing this question in terms of mass ($m_A, m_B$) and velocity ($v_A, v_B$), but your ...
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### Are faster or heavier objects in motion difficult to slow down due to kinetic energy or inertia?

The details of exactly what happens when a projectile enters a target material are reasonably complicated. There is obviously friction forces and compression forces involved. Friction id proportional ...
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### Are faster or heavier objects in motion difficult to slow down due to kinetic energy or inertia?

Just because Einstein used energy term for resisting speed on applying force make it legible term for inertia, energy is not inertia. Yes, bullet B needs more thick wall to stop it and thus more ...

### Does the ground gain kinetic energy during collisions?

Does the ground gain kinetic energy during collisions? Yes, if something has gone from "at rest" to "moving" then it has gained kinetic energy, since kinetic energy is present ...
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1 vote

### Why is coeffecient of restitution only along the Normal direction and not along the Tangential direction?

The "coefficient of restitution" approach to collisions is an approximate way to describe a more complicated material interaction (refer to "Hertz Contact Theory" for additional ...
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Accepted

### Type of collision of two billiard balls

I think what the authors are trying to get at is that if the total energy in a system is kinetic energy plus a relative position dependent potential energy, then the total energy is conserved, i.e. ...
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### Type of collision of two billiard balls

Imagine two rubber "super-balls" colliding. When they collide they compress and the distance between their centres is proportional to the stored potential energy which is converted back to ...
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### Type of collision of two billiard balls

I believe the answer is that the collision is elastic. Here the potential is purely a function of position and hence the system is conservative. If there is no loss of energy, then the collision must ...
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### Type of collision of two billiard balls

Potential energy (in this case elastic potential energy) is defined as the energy of position and kinetic energy is defined as the energy of motion. I donâ€™t see why these definitions would depend upon ...
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### Idealized Newton's cradle

Suppose we take the cradle in vacuum and minimize air resistance how can we eradicate the rest of the energy dissipation? The short answer is we can't. For one thing, there is no such thing as a ...
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### Idealized Newton's cradle

First of all, there are no elastic materials found till date and it will be like that either for eternity or a very long time. Secondly, you told that we take the cradle in vacuum, thus zero air ...

### If the oh-my-god particle hit you, would you notice?

If a baseball hits you, you will absorb all or nearly all of its energy and momentum. High-energy radiation doesn't deposit all of its energy in a small volume. The incident particle scatters off of ...
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### Conservation of linear vs. angular momentum in two similar cases

Force at the pivot don't affected the linear momentum. Lets look at the equations: for the bullet mass, $~m$ $$m\,(v_m-v_0)=\lambda\tag 1$$ for the bob mass, $~M~$ $$M\,v_M=-\lambda\tag 2$$ and for ...
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