Consider a set of particles that can have energies in multiples of E, where E is a given amount of energy.
Particle 1 has rest energy E and total energy E.
Particle 2 has rest energy E and total energy 2E.
Particle 3 has rest energy E and total energy 4E.
Particle 4 has rest energy 3E and total energy 5E.
Particle 5 has rest energy 2E and total energy 4E.
a. Which particle is moving slowest? Explain.