Problem 2.10 asks students to calculate the length contraction factor for an object moving at 0.9c relative to an observer. The length contraction factor is given by:
where v is the relative velocity between two observers and c is the speed of light. Arthur Beiser Modern Physics Solutions Of Chapter 2 Pdf
γ = 1 / sqrt(1 - (0.6c)^2/c^2) = 1 / sqrt(1 - 0.36) = 1 / sqrt(0.64) = 1 / 0.8 = 1.25 Problem 2