tracks withuniform speed of 72 km h- in the same direction, with A ahead ofB decides to overtake A and accelerates by i ms2. If after 50 sbrushes past the driver of A, what was the original distanceuniform), and how IoIlband B of length 400 m each are moving on two parallel troe driver ofthe guard of B just3.7 Two trains Abetween them ?lling with a sneed of 36 kmh-

tracks withuniform speed of 72 km h- in the same direction, with A ahe

1.	tracks withuniform speed of 72 km h- in the same direction, with A ahead ofB decides to overtake A and accelerates by i ms2. If after 50 sbrushes past the driver of A, what was the original distanceuniform), and how IoIlband B of length 400 m each are moving on two parallel troe driver ofthe guard of B just3.7 Two trains Abetween them ?lling with a sneed of 36 kmh-
Answer» Let the original separation distance be x. Then distance to be covered starting with relative velocity zero is s = 800 + x (800m being the overtaking distance from front meets rear to rear leaves front).Distance s covered at acceleration a starting from (relative) speed zero = 1/2 at^2 which for t=50 gives:= 0.5 x 50^2 = 1250mSo 800 + x = 1250 Therefore x = 1250 -800 = 450m.