The question : A car and a truck are both traveling with a constant speed of 20 m/s. The car is 10 m behind the truck. The truck driver suddenly applies his brakes, causing the truck to slow to a stop at the constant rate of 2 m/s2. Two seconds later, the driver of the car applies their brakes...
That's what I actually want to know, is there any math that has tried to approach this way of thinking, or has the entire notion of time travel just been consensually been removed by the scientific community for discussion as it's too ambiguous or vague?
alright. Poor choice of words from my part. How about we imagine at said t = 0, all matter is compressed to a point which doesn't exist (yet), thus an infinite density. That point is not too prevalent on this idea. We just need to know that every universe starts off in that fashion, and then...
Ridiculous!
I know.
But as a 9th grader, there are a few things that have been bugging me.
I had a conceptualisation of how 'time travel' could work.
However, it's based on the presumption ( a very large one at that) that the many-worlds interpretation of quantum mechanics is correct...
Yeah, I didn't think about that either. When a car has reached a point (let's say point 'A'), the same as the runner, it has already kind of overtaken him cause the car would be much longer. However, once could argue if overtaking means that the car is entirely in front of the runner or...
here's what I did :
I tried to balance both sides of the equations, to find the point where both the car and the runner are at the same place, thus ;
--> ut + 1/2at^2 = ut + 1/2at^2
--> (10)(t)+1/2(0)(t^2) = (0)(5) + 1/2(5)(t^2)
[ Here LHS if for the runner, RHS for the car. I do realise...
String theory is a vast topic, and no grade 9 book will have content on it. However, no site or video gives it the attention this topic deserves,
please input your understanding of string theory here.
here are a few general questions to think about:
1)What is string theory?
2)Why was it made...
Even so, momentum is considered a vector, yet kinetic energy, and other energies are considered scalar. Why so?
Moreover, why is pressure not a vector? wouldn't a direction be required to show where pressure acts upon?
http://webphysics.iupui.edu/JITTworkshop/152Basics/vectors/vectors.html
https://courses.lumenlearning.com/suny-osuniversityphysics/chapter/2-1-scalars-and-vectors/
content here is roughly my understanding level as well
anything upto tenth grade level,
Can someone answer the question "why is inertia caused?"
been looking for answers everywhere, but I can't seem to find anything solid.
(Keep in mind, I am only a high school student, sorry If I make an error or smth)
Just a thread to discuss ideas and questions of physics. I plan on becoming a theoretical physicist after I graduate, and feel that enriching discussions here will help further that cause.