A Manual of Experiments in Elementary Science: Teacher's Edition (1918)
Curtis, Francis D. · Charles E. Merrill Company · leaf 45
21 LEVERS the lath by placing the hook of the balance under the lath about the middle. (See Fig. 14.) Shift the position of the balance along the lath, calling attention to the indicator mean¬ while, until it is obvious to the whole class that in a third-class lever, less effort or force is… … Fig. 14 (S). the force is applied at a point as far from the fulcrum and as near the weight as possible. Answers. — 1. Sliding the fulcrum toward the weight is equivalent to grasping the lever at a point farther from the fulcrum. 2. (a) Third : the fish is W, F being applied between the fish and…
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