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Feb
24
answered Moment of inertia for a triangle?
Feb
9
comment Lagrange's equation implying Newton's 2nd law?
@lionelbrits the potential for a charged particle in an electromagnetic field depends on velocity.
Feb
5
revised Trying to understand relativistic action of a massive point particle
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Feb
5
revised Trying to understand relativistic action of a massive point particle
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Feb
5
answered Trying to understand relativistic action of a massive point particle
Jan
20
answered Find the work done in moving an object along a vector r with a force F
Jan
20
answered Computing the angular momentum in spherical coordinates
Jan
16
revised Solving the Kepler problem
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Jan
16
revised Solving the Kepler problem
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Jan
16
answered Solving the Kepler problem
Jan
13
answered Physical meaning of linear combination of possible states in infinite well
Oct
23
comment If something is not moving in space, is it moving on the time axis at the speed of light?
Fair enough @Ben Crowell. I think I first heard this statement in Greene's The Elegant Universe. It's interesting that "light doesn't age" seems to be used more regularly than "objects at rest move through time at the speed of light," when in some sense they're on equal footing. Agree / disagree?
Oct
23
revised If something is not moving in space, is it moving on the time axis at the speed of light?
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Oct
22
awarded  Informed
Oct
22
answered If something is not moving in space, is it moving on the time axis at the speed of light?
Oct
16
revised What is the significance of clamping the center of the spring?
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Oct
16
answered What is the significance of clamping the center of the spring?
Oct
15
revised Normalization of a wavefunction that's superposition of two unknown energy eigenfunctions
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Oct
15
answered Normalization of a wavefunction that's superposition of two unknown energy eigenfunctions
Oct
13
revised The Delta-Function Potential
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