A train having 60 compartments is pulled by engine with a force 6 x 104 N. If mass of each compartment is 4000 kg, the tension in the coupling between 40th and 41st compartment is:
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a
4 x 104N
b
1 x 104N
c
2.5 x 104 N
d
2 x 104 N
answer is D.
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Detailed Solution
Acceleration of train =6×10460×4000m/s2Tension in the coupling between 40th and 41st compartment =(20×4000)6×10460×4000=2×104N