What is the tension in the bottom link of the chain?What is the tension in the middle link of the chain?
F = m*g + m*a let W be the 165 N weight, W = m*g, m = W/g F = W + (W/g)*a F = 165 + (165/9.8)*1.56 F = 165 + 26.3 = 191.3 N The tension in the bottom link and the middle link are the same since the chain is of negligible weight.
