Answer:
Tâ = 15.66 N
Explanation:
From the given information:
Using the free body system in the chain.
T - mg = ma
47 - 3.12 Ă 9.8 = 3.12a
47 - 30.576 Â = 3.12a
16.424 = 3.12a
a = 16.424/3.12
a = 5.26 m/s²
Now, by the free body diagram of the lowest link; the tension (Tâ ) in the chain is:
Tâ - (3.12/3) Â Ă 9.8 = (3.12/3) Ă 5.26
Tâ - 1.04 Ă 9.8 = 1.04 Â Ă 5.26
Tâ - 10.192 = 5.4704
Tâ = 5.4704 + 10.192
Tâ = 15.6624
Tâ = 15.66 N