Question
A wagon of mass 2000kg is separated from a shunting engine moving at 54km/h. It comes to rest in 12 sec. Find the value of coefficient of friction.
Solution
Given,
Initial velocity, u = 54km/h = 15 m/s
Final velocity, v = 0
The wagon comes to rest in, t = 12s
Mass of the wagon, m = 2000 kg
The retarding force on the wagon is,
= -2500N
Therefore coefficient of friction is,
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