1. M

    Physics Depth Study Advanced Mechanics

    Hi, I just got my first year 12 assignment which is a depth study of advanced mechanics. I had one idea of investigating the motion of rockets and satellites. I could even do something with circular motion or projectile motion, taking air resistance into consideration. I just don't what to do or...
  2. C

    Simple Mechanics problem - rotating the rod with a ball attached on a string

    To the end [A] of the rod [AB] with a length of d = 1.35 m a thin string with a length of l = 1.16 m was attached, at the other end of which a ping-pong ball is attached. The bar began to rotate in a horizontal plane with a constant angular velocity ω = 2.08 / s around the end B. Find the radius...
  3. L

    fluid mechanics

    fluid mechanics urgent urgent plz help who able to solve the question?
  4. H

    Questions on confusing lever mechanics in the real world (not mathematical)

    This is based on a confusing question my brother asked out of curiosity. I know how levers work, i.e., I know they trade distance for power and vice versa. What we want to know is why that actually works in the real world, because thinking about it, it doesn't seem to click. My brother has a...
  5. M

    Fluid Mechanics

    Hi, I'm having trouble with these two questions, can anyone help. Thank
  6. L

    Quantum mechanics atomic orbitals

    Are the atomic orbitals for real??? § 20. Quantum Mechanics Quantum mechanics is based on Planck's blackbody derivation of the energy element (hγ) but Planck uses the kinetic energies of the blackbody surface electrons in the derivation of the energy element (e = hγ) since...
  7. P


    Four same homogenious bricks are stacked on top of each other as illustrated below. They all have the horisontal sidelength of ”a”. The bricks are not rotated in comparison to each other. What is the maximum value of the distance ”d” that possibly can be achieved? A illustrative picture of...
  8. P

    Widespread misinterpretation of quantum mechanics

    In these past years I came to learn of a widespread misinterpretation of quantum mechanics. This misinterpretation is not merely by amateurs and students but by professional physicists as well. The misinterpretation is that a particle, such as an electron or photon, can be in two places at...
  9. T

    Mechanics II: Hamiltonian and Lagrangian of a relativistic free particle

    The Problem: I am given the Hamiltonian of the relativistic free particle. H(q,p)=sqrt(p^2c^2+m^2c^4) Assume c=1 1: Find Ham-1 and Ham-2 for m=0 2: Show L(q,q(dot))=-m*sqrt(1-(q(dot))^2/c^2) 3: Consider m=0, what does it mean? Equations Used: Ham-1: q(dot)=dH/dp Ham-2: p(dot)=-dH/dq...
  10. S

    Newtonian and Einstinian Mechanics for avito

    Hello avito, since you have started so many threads about these subjects you must have some measure of interest in them. However your understanding is suffering from mixing them up together. The standard route to Newtonian Mechanics is by the three laws N1, N2 and N3. These are used...
  11. avito009

    Inertial force depends on mass in general relativity as well as classical mechanics.

    PMB can you explain your analysis as to why you said that inertial force does not depend on mass. Einstein mentions that spacetime warps around massive objects and the more heavy an object is the more spacetime is warped meaning more gravity. Now even though gravity depends on mass in general...
  12. L

    Fluid Mechanics help.

    Need help in this problem. I tried doing it using my only limited knowledge (1st time student of fluid mechanics) and I cannot get the answer written. No prof feedback either. this is all i got as a given. At least a hint would be appreciated.
  13. P

    Urgent! Fluid Mechanics (Non-Newtonian Fluid)

    A viscous, shear thickening material drains via gravity through a vertical pipe. If the pressure above and below the pipe is atmospheric and the pipe diameter is 50 mm, what is the length of time (s; 0DP) it will take to drain 5000 L of the material. The fluid properties are: density = 950 kg...
  14. J

    Newtonian Mechanics : Block a wedge with no friction. How to solve for accelerations?

    A wedge with mass M rests on a frictionless horizontal table top. A block with mass m is placed on the wedge . The base of the wedge is at an angle of A degrees to the horizontal. There is no friction between the block and the wedge. The system is released from rest. Determine: 1) The...
  15. T

    Help with Mechanics Question

    A ball is thrown vertically up from the ground with a speed v0. At the same instant, a second ball is dropped from rest from a height H, directly above the point where the ball was thrown. There is no air resistance. i) Find the time at which the two balls collide. ii) Find the value of H, in...
  16. S

    Deceleration force in Newtonian Mechanics

    Given an plate that has 2 pins attached to it. Each pin has a single balanced circular disc firmly attached to it. Both of the pins can rotate on their axis in both clockwise and anti clockwise direction. Now, assume the discs are rotating with the same angular velocity in opposite direction...
  17. W

    Video Game Bow and Arrow Mechanics

    I'm trying to implement bow and arrow mechanics in a game. Considering that I know two points on a grid, a launch angle, a velocity and the gravitational constant, how would I go about calculating an arrow's trajectory. Additionally, how would I go about calculating the arrow's angle along...
  18. P

    What is a measurement in quantum mechanics?

    I'm sure that all of you have heard of Schrodinger's cat thought experiment, right? How many of you know the purpose of it? I ask because I thought it was clear but this journalist doesn't appear to get it. See: Schrödinger?s Cat explained - Telegraph If you read the entire page you'll see...
  19. C

    Circular Motion Question.

    A particle of mass m oscillates along arc AB on the inside of a smooth circular hoop of radius 'a' fixed in a vertical. The force on the hoop at any point is : ? (a) k/a (b) k/3a (c) 2k/a (d) 3k/a
  20. D

    Mechanics statics wedge

    Does anybody know how to solve this problem ?