IB Physics SpaceTime Diagram

/

A tutorial sheet of true-false questions on the spacetime diagram is given below.

ɣ=1/√(1-v2/c2)

  1. Albert Einstein was not the first person to use a spacetime diagram.
  2. The path of a particle in the (x,ct) plane on a spacetime diagram is called its world line.
  3. A rigid rod is at rest in the S frame. At t=0 the spacetime coordinates of the ends of the rod in S are A=(0,0) and B=(L0,0). The worldlines of A and B have the equations x=0 and x=L0 respectively.
  4. In question 3 take ɣ = 5/4 and L0 as 2. Using a spacetime diagram the coordinates of A in S' when ct' = 4 are (-2.5,4) and the coordinates of B are (-0.83,4), the length of the rod in S' being 1.7 approximately.
  5. A rigid rod is at rest in the S' frame. At t'=0 the spacetime coordinates of the ends of the rod in S' are P=(0,0) and Q=(L0,0). The worldlines of P and Q have the equations x=0 and x=L0 respectively.