What is the final speed of a bulle.train accelerating at a rate of 200km/hr² from an initial speed of 150km/hr over a distance of 100km?
Answer (1)
The final speed is 250 km/hSolution (Using kinematic formula)We’ll use the formula[tex] \sf \: v {}^{2} = u {}^{2} + 2as[/tex]Wherev = final speed (in km/h)u = initial speed = 150 km/ha = acceleration = 200 km/h²s = distance = 100 kmStep-by-step[tex] \sf \: v {}^{2} = (150) {}^{2} + 2(200)(100) \\ \\ \sf \: v {}^{2} = 22500 + 40000 \\ \\ \sf \: v {}^{2} = 62500 \\ \\ \sf \: v {}^{2} = \sqrt{62500} \\ \\ \sf\: v {}^{2} = 250[/tex]
