. Encyclopaedia : or, A dictionary of arts, sciences, and miscellaneous literature; constructed on a plan, by which the different sciences and arts are digested into the form of distinct treatises of systems ... . ME CHANICS. 7oac&ara it l/allanc€ Jr. V •? fel M ScA. I. MECHANICS. Mechani-calTower. \ Of changing the Direction of a Fewer into one di-rectly oppopte. This in all cafes is only to be accomplished by theapplication of a power greater than that of which wewilh to change die direction. Thus, in fig. 2. fuppofeWe wifh to change the direction of the power at Efrom the direction AC t
. Encyclopaedia : or, A dictionary of arts, sciences, and miscellaneous literature; constructed on a plan, by which the different sciences and arts are digested into the form of distinct treatises of systems ... . ME CHANICS. 7oac&ara it l/allanc€ Jr. V •? fel M ScA. I. MECHANICS. Mechani-calTower. \ Of changing the Direction of a Fewer into one di-rectly oppopte. This in all cafes is only to be accomplished by theapplication of a power greater than that of which wewilh to change die direction. Thus, in fig. 2. fuppofeWe wifh to change the direction of the power at Efrom the direction AC to that of CA, we will find itimpoilible to do fo by any other means than the ap-plication of a greater power from D towards C. Jfthe two powers are equal, there will be no motionwhatever,- and the degree of motion produced at laftWill only be the difference betwixt the two it be wanted therefore to produce a power in thedirection CA, equal and oppoiite to that in the direc-tion AC, one muft be applied in the direction CAdouble to the former. This principle is different fromthe firft mentioned, in which motion is produced bypushing againft a fixed obstacle while the movingpower is not refilled on th
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