- #1
DarkestNight
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hello, I'm not saying that Newton's law of universal gravitation is really wrong but there are phenomenons which i don't think the law is really correct and i want someone to help me. There might be explanations but i don't really know any explanations right now so an explanation would be appreciated.
1. When two masses are at one point (centers align), from the equation you should get undefined amount of force but doesn't the force becomes zero when that happens as the two objects should merge into one? This scenario should have occurred many times in daily life, eg. a bullet is fired at a person. The center of the bullet might be able to exactly align with the center of the person as it pierce through the person.
2. When two centers are extremely close to each other, (d->0 but not equal to zero), acceleration should approach infinite from the equation but doesn't that mean the two masses should travel at extreme velocities toward each other? Firstly doesn't it mean that the masses will be able to exceed the speed of light as the acceleration is approaching infinite which violates Einstein's theory. Secondly if the speed of one mass does not exceed speed of light then from law of conservation of mass and momentum, the mass should approach infinite as velocity is converted to mass from equation E=mc^2. But this would lead to more problems such as the mass would attract other objects with force approaching to infinite from law of universal gravitation.
So can anyone give me an explanation to the points i mentioned above? Thanks
1. When two masses are at one point (centers align), from the equation you should get undefined amount of force but doesn't the force becomes zero when that happens as the two objects should merge into one? This scenario should have occurred many times in daily life, eg. a bullet is fired at a person. The center of the bullet might be able to exactly align with the center of the person as it pierce through the person.
2. When two centers are extremely close to each other, (d->0 but not equal to zero), acceleration should approach infinite from the equation but doesn't that mean the two masses should travel at extreme velocities toward each other? Firstly doesn't it mean that the masses will be able to exceed the speed of light as the acceleration is approaching infinite which violates Einstein's theory. Secondly if the speed of one mass does not exceed speed of light then from law of conservation of mass and momentum, the mass should approach infinite as velocity is converted to mass from equation E=mc^2. But this would lead to more problems such as the mass would attract other objects with force approaching to infinite from law of universal gravitation.
So can anyone give me an explanation to the points i mentioned above? Thanks