. A wagon of mass 2000 Kg. is separated form a train traveling at 9 Km/h
and then the wagon comes to rest in 2 min. Find resistance between thewheels of the wagon and the track.Q
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We need to calculate the retardation of the wagon. Its initial velocity is 9 Km/hr and final is zero. Time taken to stop = 2 min
9 km/hr = 2.5 m/s
2 min = 120 s
v = u + at
a = v - u /t = (0 - 2.5)/120 = -2.5/120 m/s2
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Force of retardation = ma = 2000 x 2.5 / 120 = 41.67 N
9 km/hr = 2.5 m/s
2 min = 120 s
v = u + at
a = v - u /t = (0 - 2.5)/120 = -2.5/120 m/s2
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Force of retardation = ma = 2000 x 2.5 / 120 = 41.67 N
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