Chapter 37, Problem 2Q

Figure 37-16 shows a ship (attached to reference frame S') passing us (standing in reference frame S). A proton is fired at nearly the speed of light along the length of the ship, from the front to the rear. (a) Is the spatial separation ▵x' between the point at which the proton is fired and the point at which it hits the ship’s rear wall a positive or negative quantity? (b) Is the temporal separation Δt' between those events a positive or negative quantity?

Figure 37-16 Question 2 and Problem 68.