Recent content by joyful55

  1. J

    MATLAB Matlab graphing/plotting problem

    plot([4 8], [-4 0]) plot([-8 -4], [0 4]) remember to hold graphs if you are entering commands individually.
  2. J

    Chasing a Beam of Light: Understanding Special Relativity's Thought Experiment

    From what I undestand of relativity is that the only thing that is constant in all frames of reference is the speed of light. As for distance, there is always length contraction, hence, the distance can never be simply added up using simple classical mechanics. And once you apply Lorentz...
  3. J

    Home experiment - annhialation

    But the particles aren't annihilating, they're just decomposing to give off energy in a cloud chamber.
  4. J

    Rearranging an equation for pressure

    We need batter graphics. I'm having a hard time reading equations while trying to decipher the notations.
  5. J

    Low Level Physics Problem 1D Motion

    Umm...Another question. Where in the world are you standing to hear the splash?
  6. J

    Newton's 3 Law: Analyzing Equal & Opposite Forces

    Let me try to set N3L into a much more comprehensive example. Try pushing your finger on a pin. The force was exerted by you on the pin but you still feel pain as if there is a force acting on your finger from the pin(because that force really exists).
  7. J

    Newton's 3 Law: Analyzing Equal & Opposite Forces

    Well, physics is not all about maths but more of logic and reasoning, most of all, statistics and analysis. It is from the data we analyse that we are able to come up with differential equations. For example, how in the world did we come up with acceleration being dv/dt? Through data collection...
  8. J

    Momentum in Inelastic Collisions

    No, as in you are right about it.
  9. J

    Newton's 3 Law: Analyzing Equal & Opposite Forces

    First of all, the equal and opposite assertion is meant to occur over the course of the whole collision. Try reading up and relationship b/w impulse, momentum and net force. Secondly, forget what I said about steps. The whole 3rd law, has only one single mechanism is that the force when acted...
  10. J

    Newton's 3 Law: Analyzing Equal & Opposite Forces

    Try picturing your step 3 & 4 as a single step which occurs at the same time.
  11. J

    Normal force calculation

    Just make sure you know which direction you are taking as positive, the negative signs on the formula is trivial.
  12. J

    How Accurate is Your Speed-Time Graph?

    Well, let's just say that these graphs are on an ideal case where velocity is able to switch to any value at any point of time which is in fact irrational.
  13. J

    Newton's 3 Law: Analyzing Equal & Opposite Forces

    Well actually, a change in momentum could also manifest itself as a change in both mass and velocity as in the case of rocket fuel using up and thrsuting itself into space.
  14. J

    Momentum in Inelastic Collisions

    The energy I'm talking about could be any forms of energy as in kinetic or potential or heat but not a combination of them. As for the rewritting stuff, haven't you noticed Work done is F multiplied by x and work done is in fact the change in a particular form of energy? If we were to consider...
  15. J

    Momentum in Inelastic Collisions

    Its the structural bonds of the block. Mechanical energy from the bullet is used to break up the structural bonds of the block which explains why there is a dent or a hole in the block. Pardon me, some of the mechanical energy is also being converted to heat, sound, etc. Net force could also be...
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