Question

A chain of mass 10 kg and length 10 metre is held vertical by fixing its upper end to a rigid
support. The tension in the chain at a distance 3 metre from the rigid support is
(A) 100 N
(B) 70 N
(C) 143 N
(D) 76 N​

Answer 1

Answer:

(B) 70 N

Explanation:

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TOTAL WEIGHT OF THE CHAIN =10KG

MASS PER UNIT LENGTH=10/10KG PER METER

                                          =1 KG PER METER

NOW AT A DISTANCE OF 3 METRE FROM THE SUPPORT THE FORCE EXPERIENCED IS DUE TO THE REMAINING CHAIN HANGING DOWN i.e 7 METRE

WEIGHT OF THE CHAIN =1 KG/M *7=7 KG

THE FORCE EXPERIENCED = F=mg=7*10 = 70 N

Answer 2

Explanation:

Yaa Sure..........