Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 70
sits on one end of the plank. Whereshall another boy weighing 90 lbs. sit that he may balance the first?6. What pressure will be exerted upon the log ? 10. Two horses harnessed abreast are ploughing. How can youarrange that one horse shall puU only two-thirds as much as theother ? 11. The maximum… … CENTER OP MASS OR CENTEOID. 62. Center of mass defined. — Let Fig. 32 represent any-body of matter; for instance, a stone. Every particle of thebody is acted upon by the force of gravitation. The forces ofgravitation of all the particles form a setof parallel forces acting vertically down-ward, the…
Physics
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