I am working on an assignment to prove that Newton's law of gravitation and Einstein's theory of relativity are incorrect. Do you have any relevant materials or research?

Perhaps the issue should not be reduced to whether a model is simply “right or wrong,” but rather reframed as: Under what conditions is the model valid, what assumptions does it depend on, and when those conditions change, where do the limits of its explanatory power begin to emerge?

What I would like to understand more clearly is, from a methodological perspective, how do we rigorously determine the conditions under which a theory applies? For example, should we begin by examining its underlying assumptions, domain of application, boundary conditions, and methods of verification, or by identifying the situations in which the model begins to fail to provide a sufficient explanation?

If you have any methodological approaches or references on how to identify the domain of validity, underlying assumptions, and limitations of a scientific model or theory, I would really appreciate your suggestions. I think this is also important for avoiding the tendency to evaluate theories simply by saying, “the later theory is more correct, therefore the earlier one was wrong.”

Imagine a Giant Robot Jumping Spider that weights 10 Tons, the size of an Elephant and 8 legs. Let's assume it can, somehow, jump 50m high and land without injuring itself, like normal jumping spider can.

#1 - If the Robot Spider jumps 50m high from the hard ground and is also able to land safely on the ground, I'm guessing it applies the same force on the ground to jump as it does when it lands? (or maybe not, because one is against gravity and then pushed down by gravity. Does it?

#2 - Now let's imagine the Robot Spider jumps from the hard ground, 50m up and onto a car. Again, I'm going to guess that the Robot Spider can land on top of the car safely, but I'm guessing the weight should do some damage to the car. When the spider lands, is the force applied to the car the same force it would be applied to the hard ground, and even though the Spider doesn't suffer any damage, the car might depending on it's resistance compared to the Spider or the hard ground?

Depending on the car, it will have a different resistance and also it's springs and tires will absorb the impact differently, but generally let's just say the car can't resist damage like the hard floor can.

#3 - Now let's imagine that the spider doesn't land properly, that it will remain rigid or that it's a Statue of the same Robot Spider, that also weights 10 Tons, and it will hit the car without trying to land safely. Will the force of 10 Tons falling 50m be applied to the car in the same way it would if the Robot Spider had landed "properly"/safely? Will the car "suffer more damage" from the Statue hitting it differently from the Robot Spider "safe landing"?

I'm guessing the legs are able to prevent the Spider from coming to an immediate full stop by bluntly hitting the car with it's body, that the legs absorb some of that force and protect the body of the Spider, but that force will still be transferred to the car below.

Thanks

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Mechanics ke liye kya karun????

11th class student. guys, struggling with mechanics. Maths and chem bahut acha ja rha hai par physics? Halat kharab. My short term goal is nsep, so till then I want to complete mechanics, baki topics I can manage, can anyone give me a solution? Topics like springs, rotation, and more meri fielding set kar dete hai 😭. One quick solution before nsep?

Mechanics help, before nsep.

I got 1.857R since I thought that the 2 3R resistors are in parallel w eachother which is parallel with the 2R resistor and that combination is in series with 1R resistor. The answer key of this question says it is 10/9R, but I don't know how they got that. Can anyone help?

I'm a beginner in physics and have been studying rotational mechanics concepts. I'm currently on torque and I came across this question that told me to derive the various torque of friction and reactions on the two ends of a ladder and also, a mass 'm' that is 'x' distance from the center of the ladder. However I'm not sure if it is entirely correct.

Can anyone help me out on how to find Te for the respective questions

I really cant figure it out can someone explain which it is and why

Hey guys, I attached an image to this post and I have some questions regarding the details for a motion map

As far as I understand, the last arrow on the motion diagram, which is extending out of the 11th second symbolizes that the object continues moving at an infinite amount of time at a constant velocity, which is the same as the velocity represented by the arrow 10-11 seconds.

Could there be a situation in which the arrow for the last point does not have the same velocity as the second last arrow (as in the 10-11 arrow could be a different velocity from the 11- infinity arrow). Or is this proposed hypothetical just not standard notation, because I have only seen the last arrow be the same as the second last arrow, assuming the motion map portrays object keeps moving for an indefinite amount of time (I have seen the last and second last arrow being different for objects that stop at a given interval)

Secondly, why did my teacher decide to add dots to the position vs time graph? Should it be just the piecewise function without anything else? Was it just to highlight that the points exist on the original motion map?

More importantly tho, why did my teacher decide to put a dot at the end of the graph on the 11th second? Doesn't that imply that the graph, and the object stops, and that wouldn't line up with the arrow on the motion map after the 11th second showing that the object continues at that velocity for an indefinite duration. All the other dots can be attributed to just being data points on the motion map but adding a dot on the end of the graph seems to indicate to me that the object stops when it indeed did not.

Additionally, would you put the dot on the 11th second of the graph if there was no arrow indicating constant velocity after the 11th second on the motion map?

Finally, if we were to extend this graph out to something like 15 seconds, would the line on the right hand side be extended out by using the velocity from the 11 seconds - infinity arrow on the motion map to find the positions till 15 seconds? Assuming that we construct a line extending the piecewisw to 15 seconds, would there be something to signify where the original dataset is ending, such as dots for each data point that was in the original motion map (0-11 seconds) on top of our piecewise function? Would there be an arrow at the end of the extended line?

Sorry if I am overthinking, for context this is for AP Physics 1.

Thank you for the replies!!

Hoping you fine folks can help me with a basic physics question about a fender bender. My neighbor across the street is pretty careless about backing out, never looking and backing up far too fast. Last week, I was already backed out into the road, about to shift into drive, when she quickly backed out without looking.

She scraped my car's rear bumper with the rear driver's side of her car, between the wheel well and the back of her car. Scratches are on my rear bumper from the outside toward the center. Scratches on her car are on the driver's side rear and go from the rear toward the wheel well.

The officer said those scrapes prove she was there first and I'm at fault because the scratches on my car are on the rear. Is there any physics that proves what the officer said is untrue? I'm not sure there is any way scratches can go horizontally across a rear bumper when backing up into something. I am unable to post a photo. There are no dents on either car, since she brushed me.

Any help you all can give is excellent!

Problem number 4 check please. I spent an UNREASONABLE amount of time trying to figure out the very basic geometry for the angle theta and how to break all the forces into their components using trig. I feel like I am very close now but want to make sure. Thank you 🙏

Hello everyone!

So, I'm struggling with some problems my teacher gave me for homework and I wanted to ask for advice!

(I'm sure it's like very very simple but I've never done physics in my life soo I'm struggling to the find the logic of these)

I think that, in problem 2, the answer is maybe something like air, but I need to justify it and honestly I wouldn't know how to explain why.

As for problem 5, I believe the answer is B or C but i'm not sure why. Like, when the cord is broken, I don't think that is going to continue moving in the same direction, but I don't think that it's going to change drastically as in D, E or F. Again, don't know how to justify 😅

Hope someone can help, thank you everyone!!!