Physics 11 Relativity Worksheet #1 7. A 20.0 m long bus drives past ...

4. A fast train is traveling at 2.50x10 8 m/s compared to the ground outside when a passenger runs towards the front of the
train at a speed of 1.50x10 8 m/s compared to the train. How fast is the passenger traveling compared to the ground?
5. The same train is still traveling 2.50x10 8 m/s compared to the ground when a second passenger jogs towards the front
of the train. Compared to ground outside, the person is jogging at 2.75x10 8 m/s. How fast are they going compared to
the train?
6. A rocket ship is moving away from the Earth at 0.800 c when it fires a probe forward at a speed of 0.500 c relative to
the space ship. How fast do Earth observers say the probe is moving?