Suppose a spaceship A and a spaceship B are moving towards each another. Spaceship A fires a missile at spaceship B. The speed of the missile, relative to spaceship A, is . The speed of the missile, relative to the spaceship B, is . What is the relative velocity of the two spaceships?
Two planets are on a collision course, heading directly toward each other at a speed of . A spaceship sent from one of the planets approaches the other planet at a speed of as measured in the reference frame of the other planet. What is the speed of the ship relative to its planet of origin?
Suppose a spaceship heading directly away from the Earth at can shoot a canister at relative to the ship.
What is the velocity of the canister relative to Earth if it is shot directly at Earth?
What is the velocity of the canister relative to Earth if it is shot directly away from Earth?