Chapter 29.4, Problem 4EYU

A passenger jogs toward the front of a train with a speed of 2 m/s. The tram itself moves with a speed of 8 m/s relative to the ground. In classical physics, we would say that the speed of the passenger relative to the ground is 10 m/s. In principle is the correct relativistic speed of the passenger relative to the ground greater than, less than, or equal to 10 m/s? Explain.