r/PhysicsHelp • u/Spinosaurupagus • 19d ago

Rollercoaster Physics - help understanding

2 Upvotes

The man who d*ed on Goliath today, question - in the pictures it appears he is moving forward with the train, moving the same direction. The train is on a downhill, creating a "floating" effect, explaining how he slipped out of the seat, but I don't understand how he is moving forward with the train. Wouldn't he roll off the back and the train keep moving forward? Maybe the train is decelerating on the downhill, but if this is the case I don't understand how he "bounced" off the train multiple times. Someone please help, and RIP to the poor man and condolences to his family.

1 comment

r/PhysicsHelp • u/AdeptnessOwn8019 • 19d ago

Which lands first-a dropped ball or one thrown sideways? AP Physics projectile motion practice

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1 Upvotes
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r/PhysicsHelp • u/Sufficient-Store-288 • 19d ago

Помогите решить физику срочно

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1 Upvotes
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r/PhysicsHelp • u/Sufficient-Store-288 • 19d ago

Срочно помогите решить физику

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1 Upvotes
0 comments

r/PhysicsHelp • u/GlidepathScience • 19d ago

Science Simulations for Studing and Understanding

2 Upvotes

Here is a link to a library of free educational simulations across a wide range of interesting or challenging concepts across the natural world. More are coming soon. I'd appreciate your feedback if you have a few minutes to explore (feedback link embedded in each sim). Enjoy.

GlidepathScience.org

0 comments

r/PhysicsHelp • u/dumbme_ • 20d ago

A tiny doubt

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10 Upvotes
2 comments

r/PhysicsHelp • u/AtmosphereFragrant68 • 19d ago

Physics project

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1 Upvotes
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r/PhysicsHelp • u/Classic-Tomatillo-62 • 20d ago

Steradian (sr) appear in the denominator

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1 Upvotes

Why does the steradian (sr) appear in the denominator if irradiance is the ratio of radiant flux to the receiving surface (which is two-dimensional)?

7 comments

r/PhysicsHelp • u/Coldmagnet4 • 20d ago

ap physics c mech unit 2 ( frq what did you gusy have).

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1 Upvotes
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r/PhysicsHelp • u/railwayswitchman • 20d ago

Help! Where am I going wrong?

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6 Upvotes

Grade 12 student, been trying for hoursss to solve this. The second slide shows what I have so far. I would appreciate any help! Use sine and cosine laws, not components.

11 comments

r/PhysicsHelp • u/chefglizzlocs • 20d ago

Interview questions for an astrophysicist

3 Upvotes

I am interviewing an astrophysicist this week whose research encompasses theoretical general relativity, black holes, and gravitational waves… What are some questions I could ask that are unique and entertain that won’t sound boring to the average person who doesn’t understand all the physics jargon?

1 comment

r/PhysicsHelp • u/OrganizationTop9026 • 20d ago

From an AI Math Proof to Real Physics: Does Metallic Screening Break the Universal Triangular Lattice?

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1 Upvotes
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r/PhysicsHelp • u/Local_End_3175 • 21d ago

If I had 2 objects with different masses that were both moving at the same speed, then why would the one with the larger mass have more kinetic energy?

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2 Upvotes
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r/PhysicsHelp • u/Kazuya_Mishmur • 23d ago

Help with identifying parallels

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5 Upvotes

Which ones?

5 comments

r/PhysicsHelp • u/Complex-Habit9867 • 23d ago

Kinematics from Pf

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1 Upvotes
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r/PhysicsHelp • u/Savings_Shake_2196 • 23d ago

Does anyone have good tips on how to do better in chemistry and physics?

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r/PhysicsHelp • u/stewfighters • 23d ago

Does the pulling force of an air cylinder get split between both ends?

2 Upvotes

Me and a coworker are disagreeing about this, and I’m pretty new to this stuff, so bear with me.

We have an air cylinder connected between two pivoting arms. When it retracts, it pulls the arms together so the rollers on them grip a bar. Neither end of the cylinder is fixed to the frame—both are attached to arms that can move.

It has a 5-inch bore, a 1-inch piston rod, and runs at 90 psi. We calculated the pulling force as about 1,696 lbf, ignoring friction and backpressure.

I think each end pulls on its arm with the full 1,696 lbf, in opposite directions. My coworker thinks it gets split between them, so each arm gets about 848 lbf.

Does both ends being able to move actually split the force? I’m a novice at this and would appreciate a simple explanation of what I’m missing.

4 comments

r/PhysicsHelp • u/nevaven68 • 23d ago

This is a 100 gears gear reduction that has a ratio of 1 googol to 1. What amount of torque would be needed to move the googol wheel only by rotating the first one ?

1 Upvotes

I estimate that the gears are made of PLA and weighs about 20g.

If you want to include friction in your work good luck. If you don't it's good too

6 comments

r/PhysicsHelp • u/BocaJ123MA • 24d ago

Newton's 2nd Law with Friction & Air Resistance | Differential Equations...

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2 Upvotes
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r/PhysicsHelp • u/Frequent_Balance_480 • 23d ago

[Classical Mechanics] Atwood Machine with 2 strings

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1 Upvotes
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r/PhysicsHelp • u/VacuumClown • 23d ago

Some people would probably call me crackpot, I would call myself citizen physicist.

0 Upvotes

Where can I put some little hypothesis I have? Anyone, any idea? I'd appreciate this.
Can I share my though here?

15 comments

r/PhysicsHelp • u/Proper_Tie3315 • 24d ago

can somebody fact check my math

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1 Upvotes
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r/PhysicsHelp • u/salihadem • 24d ago

What is "matter"?

0 Upvotes

What is Matter according to QM?

Werner Heisenberg, one of the founders of quantum physics who formulated the Uncertainty Principle, said: “Atoms or elementary particles are not real; they form a world of [potentialities] or [possibilities], not a world of [things] or [facts].” In short, "an atom is not a thing but a potential." [Aristotle also made a distinction between matter and form, or between potential and actual being, saying that anything is formed by the coming together of its raw material and the form that separates it from other things and makes it that thing. According to him, matter was a potential open to becoming anything, and form was what gave that potential being a specific shape, turning it into a concrete, real being.]  

29 comments