Wauchope, Joseph Alliene, 1873- · Chicago, Scott, Foresman and Company · leaf 17
nefficiency of 100%? Why? Repeat the experimentwith the fulcrum out of center, and note whether theefficiency of the lever ever seems to be greater than 1 ?Is it ever really so? Why? Why are levers useful,since efficiency is less than 1 ? Do you ever use levers?Where and how? Mechanics 15… … Directions.—Arrange the apparatus as shown in thediagram, letting balance M represent the man andbalance B the boy. Move the weight W along therod until the reading of M is twice that of B. Takethe readings of the balances. In reading the balancesmake correction for the weight of the rod; this…
Physics
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