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Not only is momentum conserved in all realms of physics, but all types of particles are found to have momentum. We expect particles with mass to have momentum, but now we see that massless particles including photons also carry momentum.
The answer to this question is simple and requires only SR, not GR or quantum mechanics. In units with c = 1, we have m2 = E2 − p2, where m is the invariant mass, E is the mass-energy, and p is the momentum. In terms of logical foundations, there is a variety of ways to demonstrate this.
Learn about and revise momentum, conservation of momentum, and the relationship between force and momentum in collisions with GCSE Bitesize Physics.
Physics students often ask how it is that a massless photon can have momentum. In this video, Fermilab’s Dr. Don Lincoln shows that the question arises from ...
- 11 min
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- Fermilab
Jul 24, 2023 · A moving object has momentum which is defined by the equation: p = mv. Where: p = momentum in kilogram metre per second (kg m/s) m = mass in kilograms (kg) v = velocity in metres per second (m/s) This means that an object at rest (i.e v = 0) has no momentum.
Linear Momentum is defined as 'the product of an objects mass and velocity'. That's straightforward but why does momentum have the symbol 'p'? This video starts with the basics before we look at conservation of linear momentum in the next video.
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Review your understanding of momentum in this free article aligned to NGSS standards.
