A stationary observer Bob, observes Alice take 5 seconds to travel from point A to B at 0.95c. How much time does Alice measure the journey from A to B to take?

This question is all about the application of Special Relativity. In order to solve this problem we need to identify that the correct equation to use here is:t= (gamma factor)t₀Where t is the time observed by Bob, t₀ is the time observed by Alice and the gamma factor = 1/Sqrt(1-(v²/c²)We need to rearrange the equation for t₀, giving t₀=t/(gamma factor) t₀= t(Sqrt(1-(v²/c²))Subsituting t =5 s, v = 0.95c, we obtain:t₀=(5 s)(Sqrt(1-0.95²))t₀ = 1.56 s