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Retardation produced, due to brakes, in moving train is 0.5 m/s². Train stops after 40s after application of brakes. If train is to stop in a certain place on platform, what would be the distance from plathform, of a place where brakes are appplied ? GSEB - Class 9 Chapter - 1.Motion Page 16 |
| Answer» RETARDATION = change in velocity /TIME taken0.5 = change in velocity /40change in velocity = 20m/sSince train STOPS final velocity (v) = 0Let u be initial velocity 20 = u-vu = 20s =UT +1/2 at^2(20)(40)+1/2(-0.5)(40)(40)800-400s = 400mHope this HELPS you | |