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  1. H

    Find hinge force

    Can you please clarify whether the rod is in equilibrium in its horizontal position or is it undergoing a circular motion.
  2. H

    Particle in shm

    Thanks a lot. Can you please guide me to a rigorous proof of the concept of superposition? The result doesn't seem readily apparent to me. Also that is the significance of the system being linear?
  3. H

    Particle in shm

    (d2x1)/dt2=-ω12x1 (d2x2)/dt2=-ω22x2 Isn't the property of addition of the SHM's based on the addition of forces? If ω is same we can directly add the displacements.(taking -ω2 common from the two equations) But how will i prove that the addition of SHM's in case of different ωs will result in...
  4. H

    Particle in shm

    Homework Statement A particle is subjected to two simple harmonic motions given by x1=2[sin(100πt)] x2=2[sin(120πt+{π/3})] where x is in centimetre and time is in seconds. Find the displacement of the particle at t=1/80 Homework Equations The Attempt at a Solution The...
  5. H

    Free Fall Question

    no on the contrary you should try it by taking time as a variable.
  6. H

    Rigid object in equilibrium?

    try to write both 1)∑F=0 2)∑τ=0 for your system
  7. H

    Rigid object in equilibrium?

    mmm no. what do you know about torques in static equilibrium ?
  8. H

    Rigid object in equilibrium?

    what does the fact that the body is in static equilibrium indicate to you?
  9. H

    Hybridization Question

    The carbon you referred to has 2 double bonds,1 on either side. To make 2 double bonds carbon requires 2 p orbitals... This is similar to the case of the triple bond..
  10. H

    Summing a series

    Homework Statement Find the nth term and sum to n terms of the series 12,23,60,169,494.. Homework Equations The Attempt at a Solution well each term is the triple of the previous term minus some constant. 23=10*3-7 60=23*3-9 .. .. This way i am able to write the nth term as...
  11. H

    Object undergoing acceleration

    what do you know about the initial directions of the velocity and acceleration?
  12. H

    Stopping a car before collision

    Homework Statement A person driving a car suddenly sees a wall .At that instant velocity of the car is v. Coefficient of static and kinetic friction is μ. The mass of the car is M. To avoid the driver should ....(acc. due to gravity=g) a)apply breaks b)turn (the car shouldn't slip while...
  13. H

    Simple FBD problem

    I wasnt having any actual problem in solving questions it was just that i wanted to check whether or not i could derive relations by using different x-y directions, but the new general equations turned out to be useless.
  14. H

    Simple FBD problem

    from here i have got the relations 1)N=M.g.cosθ+M.a.sinθ 2) a.cosθ=g.sinθ Edit:i have forgotten to consider the normal force from underneath , i'm going to re-write the equations Edit: nevermind these equations are totally useless
  15. H

    Simple FBD problem

    I have taken g to be the acceleration downwards due to gravity
  16. H

    Simple FBD problem

    horizontal components of acc. are-- a and (nsinθ)/m and force are-- ma and nsinθ but my main question is that is my equation 3 correct?
  17. H

    Simple FBD problem

    Homework Statement see attached image Homework Equations F=ma The Attempt at a Solution I have the relations 1)M.asinθ=N 2)N.sinθ=Ma Which one is correct and why? 3)if (1) is incorrect is the correct relation --M.asinθ+M.gcosθ=N?
  18. H

    WEDGE and block

    What velocities are the same? I dont get it EDIT:Thanks i got it A1=a2sintheta
  19. H

    WEDGE and block

    Homework Statement A block A of mass m is placed over a wedge B of same mass m. Assuming all surface to be smooth. The displacement of block A is 1 sec if the system is released from rest is : Homework Equations The Attempt at a Solution i have made fbds and have the relations-...
  20. H

    Exchange energy of electrons in degenerate orbitals

    can you please elaborate? my actual question is -how is exchange energy a relevant factor to stability and what is it actually.
  21. H

    Exchange energy of electrons in degenerate orbitals

    Alright but i still haven't got my answer
  22. H

    Exchange energy of electrons in degenerate orbitals

    We are taught that a reason for the stability of half filled or fully filled orbitals is due to the high exchange energy. Now i get why the exchange energy would be higher compared to other configurations but i don't understand why electrons present in degenerate orbitals would want to exchange...
  23. H

    Bohr model energy jump

    Thanks a lot i was not considering the decrease in effective charge. that's why i wasn't able to understand the numbers
  24. H

    Bohr model energy jump

    well since energy increases as distance from nucleus increases and the energy gap b/w consecutive orbits decreases, it seems to me that if what i am saying is true, then distance b/w n=1 and n=2 should be greater than n=2 to n=∞, which is wrong. Edit: thanks a lot i got my mistake Edit 2: this...
  25. H

    Bohr model energy jump

    this is exactly what i am getting, but thinking logically shouldn't the transition from n=∞ to n=2 produce a greater energy change?(than n=2 to n=1) Also wouldn't this imply that to ionize an atom from the second shell the energy required is atleast less than half than that to ionize it from the...
  26. H

    Bohr model energy jump

    Am I right in saying that in a Hydrogen atom when an electron jumps from the second orbit to the first one the energy change is more than any other possible jump (when the jump is not to the first orbit). The calculations seem to support me but it doesn't feel right.
  27. H

    Velocity vs displcement graph

    isn't this just v^2-u^2=2ax? Anyways, i see that with increase in x, a decreases therefore the graph looks like this? (see attachment)
  28. H

    Velocity vs displcement graph

    i was wondering what the equation of the line/curve on a velocity vs displacement graph would be which would indicate constant acceleration. I am totally stumped. EDIT:please feel free to shift the thread to any other place if need be, but since it wasn't coursework this seemed to be the natural...
  29. H

    Uncertainty in spectrum

    why doesn't the uncertainty principle lead to small discrepancies in the spectrum of the same element in different situations? I think that since there is a whole area for the electron to jump from and to and therefore a small range of values of possible jumps for a single shell, so there...
  30. H

    Velocity vs displcement graph

    thanks for your reply. i have solved the question. 1 doubt though which extra variable is generated? on differentiation v becomes a s becomes v constant is eliminated
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