B Energy & Pendulums: Is Negative Energy Real?

Paige_Turner
Messages
44
Reaction score
9
TL;DR Summary
A rising but slowing pendulum...
Does "absorbing" negative energy from gravity cancel the upward momentum of the pendulum?
Or what?
Where can I see energy being negative? Does it repel stuff?
It sounds impossible.
 
Physics news on Phys.org
All we really know is that the pendulum slows down.. You need to know the math and the experimental result. The rest of it is made up, so we can make the words mean anything we wish
 
Paige_Turner said:
Does "absorbing" negative energy from gravity cancel the upward momentum of the pendulum?
Write down the actual math. Is there any "energy" in it that is negative? (Hint: you can write down the math so that there is, but it won't mean what you seem to think it means.) You can even use the Newtonian math, which is simpler.
 
Thread 'Can this experiment break Lorentz symmetry?'

Thread 'Can this experiment break Lorentz symmetry?'

1. The Big Idea: According to Einstein’s relativity, all motion is relative. You can’t tell if you’re moving at a constant velocity without looking outside. But what if there is a universal “rest frame” (like the old idea of the “ether”)? This experiment tries to find out by looking for tiny, directional differences in how objects move inside a sealed box. 2. How It Works: The Two-Stage Process Imagine a perfectly isolated spacecraft (our lab) moving through space at some unknown speed V...
View full post »

Thread '1-Way Speed of Light'

Does the speed of light change in a gravitational field depending on whether the direction of travel is parallel to the field, or perpendicular to the field? And is it the same in both directions at each orientation? This question could be answered experimentally to some degree of accuracy. Experiment design: Place two identical clocks A and B on the circumference of a wheel at opposite ends of the diameter of length L. The wheel is positioned upright, i.e., perpendicular to the ground...
View full post »

Thread 'How can a black hole absorb matter?'

According to the General Theory of Relativity, time does not pass on a black hole, which means that processes they don't work either. As the object becomes heavier, the speed of matter falling on it for an observer on Earth will first increase, and then slow down, due to the effect of time dilation. And then it will stop altogether. As a result, we will not get a black hole, since the critical mass will not be reached. Although the object will continue to attract matter, it will not be a...
View full post »

Similar threads

A Negative energy in Hawking radiation
Replies
1
Views
1K
I Does Phantom Dark Energy Violate Conservation of Energy?
Replies
25
Views
2K
B What Does Hawking Mean by Negative Energy at the Big Bang?
Replies
1
Views
2K
I Does potential energy curve spacetime?
Replies
28
Views
2K
B Does Negative Mass Have Physical Significance in Modern Theories?
Replies
5
Views
2K
I Interpretation of Potential Energy as Field Property
Replies
5
Views
1K
B Particle with negative mass inside a black hole horizon
Replies
25
Views
2K
B What Is Negative Energy and How Does It Affect the Universe?
Replies
12
Views
2K
A A global energy conservation law in general relativity
Replies
36
Views
429
I Negative Mass and Hawking Radiation
Replies
6
Views
3K

Hot Threads

Recent Insights

Back
Top