inertia momentum 到底是什么/?

helpful

inertia momentum 到底是怎样的不太懂噢
还有elastic collision inelastic collision 为什么相撞前后MOMENTUM会一样呢?
请大家帮帮忙因为跟不上补习
谢谢帮忙

jinqwem

是initial 还是inertial?
elastic collision momentum and energy conserved,
inelastic collision momentum conserved but energy non conserved,,...
momentum conserved is becoz the force during impact is the same for both party...
相撞物体在相撞那一刻承受的力度相同.....进而推导出动量守恒的观念.....
有问题吗?

外星護法

inertia是一样东西不要改变自己原本的动作。。
momentum是激速，没有一个特别的意思。。

我学到的就这样。。刚学的。。

elaine_kook

Inertia is the tendency of an object to remain at rest or continue its uniform motion in a straight line. Momentum is the product of mass and velocity.

mikata

原帖由 jinqwem 于 21-4-2007 08:46 PM 发表
是initial 还是inertial?
elastic collision momentum and energy conserved,
inelastic collision momentum conserved but energy non conserved,,...
momentum conserved is becoz the force during impa ...

To be more precise, it's the kinetic energy that is not conserved.
Energy is always conserved as it cannot be created or destroyed.

elaine_kook

原帖由 mikata 于 18-5-2007 11:33 PM 发表


To be more precise, it's the kinetic energy that is not conserved.
Energy is always conserved as it cannot be created or destroyed.

Kinetic energy is not conserved? It's also a form of energy which can transform from 1 form to another.

NISKYLINE

A perfectly elastic collision is defined as one in which there is no loss of kinetic energy in the collision.

An inelastic collision is one in which part of the kinetic energy is changed to some other form of energy in the collision such as friction.

iZoC

原帖由 外星護法 于 28-4-2007 05:19 PM 发表
inertia是一样东西不要改变自己原本的动作。。
momentum是激速，没有一个特别的意思。。

我学到的就这样。。刚学的。。

对了....
INERTIA 是对了...但要加上--OBJECT 还是会维持不动如果没有外力.....牛顿大哥的牛顿第一定律...

MOMENTUM 是MV了吗??不懂怎么样解释了.....是一个OBJECT 的移动的力量吗???
我5,6 年前学的....

mikata

原帖由 <i>elaine_kook</i> 于 19-5-2007 03:47 PM 发表<br />

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Kinetic energy is not conserved? It's also a form of energy which can transform from 1 form to another.

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As far as kinetic energy is concerned, it is not conserved, in other words, some kinetic energy is lost to some other forms like sound, frictional. But when u say energy as a whole, meaning whether it's kinetic, potential, etc, the total amount of energy as a whole is conserved. Some people believe that the total amount of energy as a whole is not conserved, meaning, u gain from or lose energy to "somewhere"...i m not those people.

elaine_kook

sorry, i have mistaken.

Collision, basically, can be categorized in to 4 types:

1. Elastic collision, where  both objects collide n repel each other n move in opposite direction. Total kinetic energy is conserved.

2. Inelastic collision ,where both objects collide n they move together with same speed n same direction(sticking together). Total kinetic energy is not conserved,yet it decreases.

3. Completely inelastic collision, where both collide, one of them will stop at the point they collide while the other one move in the opposite from its original direction. Total kinetic energy is not conserved,yet it decreases, indeed.

4. Explosion, where two objects are sticked together in their initial state,but during explosion each of them start to moves in opposite direction with each other. Total kinetic energy is not conserved,yet it increases.

*for all the above collisions, total energy is conserved.

Total initial momentum before collision = total final momentum after collision.

momentum is always conserved in any collision.

Ganbate Kudasai...^@^

Collision, basically, can be categorized in to 4 types:

1. Elastic collision, where  both objects collide n repel each other n move in opposite direction. Total kinetic energy is conserved.

2. Inelastic collision ,where both objects collide n they move together with same speed n same direction(sticking together). Total kinetic energy is not conserved,yet it decreases.

3. Completely inelastic collision, where both collide, one of them will stop at the point they collide while the other one move in the opposite from its original direction. Total kinetic energy is not conserved,yet it decreases, indeed.

4. Explosion, where two objects are sticked together in their initial state,but during explosion each of them start to moves in opposite direction with each other. Total kinetic energy is not conserved,yet it increases.

*for all the above collisions, total energy is conserved.

Total initial momentum before collision = total final momentum after collision.

momentum is always conserved in any collision.

Ganbate Kudasai...^@^