Recent content by j04015

  1. J

    The electric potential inside a conducting sphere with charge Q

    Can you explain that in more detail?
  2. J

    The electric potential inside a conducting sphere with charge Q

    If there is no field inside the conductor, how can there be electric potential? I think of potential very similar to gravity, as how much energy would be required to move a particle of mass/charge against the gravitational/electric field. If there is no field at all, how would there still be...
  3. J

    Why are the forces on torque tension and not the weight of the mass?

    Let the left string be T1 and the right string be T2. Pretend that the masses are NOT equal and that the total mass on the left is 3mg and the total mass on the right is 2mg. My first thought: Net torque = 3mgR1-2mgR1 Actual solution: Net torque = (T1-T2)*R Once again, the force that's used...
  4. J

    1999 AP Physics C Mech: Conservation of momentum and energy

    I see the issue now. Momentum is conserved but not energy. Thanks!
  5. J

    1999 AP Physics C Mech: Conservation of momentum and energy

    If the collision wasn't elastic the entire problem doesn't make sense.
  6. J

    1999 AP Physics C Mech: Conservation of momentum and energy

    Whoops, typo. I meant (1/2)(mv0)^2
  7. J

    1999 AP Physics C Mech: Conservation of momentum and energy

    Why is (1/2)(mv0)^2 = 1/2(M+m0)gh not a valid equation for conservation of energy? Isn't the energy from when the dart is shot the same as when the two masses move at speed v?
  8. J

    What is a Solid Angle and How is it Calculated?

    m/s / m = 1/s
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