Positive SSL
1 如圖所示之起重機輪系,其齒輪A、B、C與D的齒數標示於圖中,已知其曲柄K的半徑R為400mm,捲筒直徑d為250mm,若在曲柄上施力F=150N,且不計摩擦損耗下,則能吊起的重量W為多少N?
A 5000N
B 6250N
C 7680N
D 8750N

e = 21×25100×84 = 116

W150 = 2×400250 ×16

W = 7680N