Saved Bookmarks
| 1. |
Q14 Two trains X and Y are running on parallel tracks with a speed of 72km/h and 54km/h respectively The driver of train X applies the brake and it comes to a stop in 10seconds. While the driver of train Y applies the brake and the train retards uniformly before coming to rest in 15 seconds. Plot distance- time graphs for both the trains. Also, calculate the distance travelled by each train after the brakes were applied Look |
|
Answer» Here, is your answerThe initial VELOCITY is GIVEN by U=72km/hrTo convert it into SI system ie. (m/s), multiply it with 5/18.Therefore,u = 72*(5/18)=20 m/sFinal velocity = 0 m/s (Since the train comes into rest)Acceleration, a= - 0.2 m/s^2We have to find the distance s.So by Third EQUATION of motion,v^2 = u^2 + 2aSS= (v^2-u^2)/2a= (0-400)/-0.4=1000 mie, the distance travelled by the train before it come to rest is 1000 mSTEP BY STEP EXPLANATION:Hope it would help you. And please mark it as brainliest and please FOLLOW me. |
|