VR=2+1 W (d) Here gun tackle reeves to disadvantages and another gun tackle is rigged to advantages Standing block Disadvantage VR=2 Moving Moving block Advantage 10 VR=2+1 Standing block Effort (S) = W+(nwf%) / V.R. = 10(0) / 2+ (2+1) = 1.67 M.A. = 10/1.6667 = 6
VR=2+1 W (d) Here gun tackle reeves to disadvantages and another gun tackle is rigged to advantages Standing block Disadvantage VR=2 Moving Moving block Advantage 10 VR=2+1 Standing block Effort (S) = W+(nwf%) / V.R. = 10(0) / 2+ (2+1) = 1.67 M.A. = 10/1.6667 = 6