Vehicle M moves at constant speed v. Vehicle L starts with u and a. Vehicle K starts with 2u and a. Both reach finish line at the same time. What is initial distance d between L and K in terms of x (L’s distance)?
1. L: x = ut + 0.5at^2. 2. K: x + d = 2ut + 0.5at^2. 3. Subtracting gives d = ut.