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find the mechanical advantage and hence the effort if the efficiency is 75%.a pulley system having 5 pulley is used to raise a
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If angle ABD is 79 what is angle ABC and DBC DBC (5x+4) ABC (8x-3)?
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During volcanic erup- tions, chunks of solid rock can be blasted out of the vol- cano; these projectiles are called volcanic bombs. Figure 4-51 shows a cross section of Mt. Fuji, in Japan. (a) At what initial speed would a bomb have to be ejected, at angle
