One particle is moving with a velocity of 15 m/sec. After 10 seconds, it appears that the particle moves with a speed of 35 m/s. Particles at a distance of a few meters.
The particles are moving at a speed of 15 m / sec to 10 sec appears that the particles moving at a speed of 35 m / s, the particle moves a distance of a few meters.
One particle moving speed 15 meters / second. After 10 seconds. It appears that the fast moving particles 35 meters / sec. Particles moving distance in metres.