PHYS 3310 Module 1 Activities 2

Bob is standing at the center of his railroad car as it passes Alice on the ground. Firecrackers attached to the ends of the car explode. A short time later, the flashes from the two explosions arrive at Bob at the same time.

Were the explosions simultaneous in Bobs reference frame? If not, which exploded first? Explain.

Were the explosions simultaneous in Alice’s frame? If not, which exploded first? Explain.