912 can be affixed to a rope hook 990 fig9 c shows how the end portion 954 of the trailing end 952 of the rope 912 can be secured by hooking the rope hook 990 into the first tie down aperture 917 of the tie down tensioning device 913 with the end portion 954 of the trailing end 952 of the rope 912 being secured in the embodiment of fig9 c an object to be lifted can be coupled to the first pulley apparatus 910 e g it can be hooked onto the hook 950 or the first pulley apparatus 910 can be oriented with the hook 950 pointed up or rotated relative to the support structure and the object can be hooked into the pulley aperture 936 the leading end 951 of the rope 912 can be pulled which can cause the first pulley apparatus 910 and the attached object to move upwardly pulling the rope 912 a distance of x will cause the object to move upwardly by a distance of roughly x 2 if the object weighs y pounds the rope 912 must be pulled with a force of y 2 pounds in order to lift the object the method of creating a block and tackle illustrated in fig1 a 10c involves multiple pulley apparatuses 910 911 as.