Superman chases bullets in his free time If the bullet is go

Superman chases bullets in his free time. If the bullet is going 2500 ft/s and is 100 feet ahead of him, how long will it take him to catch up? He can fly 2500 ft/s.

Please help me to start off the problem, I want to solve for the final answer before you(Whomever) solves it in full. My first question is do I count both velocities as final velocities or initials? Thank you very much for all of your help.

Solution

In this perticular situation relative velocity need to be taken as the source.

If two bodies are moving (in the same direction or in the opposite direction), then the speed of one body with respect to the other is called its relative speed.

In this question no need to to count Final velocity or Initial because the relative velocity between bullet and superman is Zero.

Relative velocity: (Speed of bullet-Speed of Superman) = (2500 ft/s - 2500 ft/s) = 0

Hence their could not be any estimated or calculated time to catch up bullet by him.