3. A crowbar of length 100 cm is used to lift a load of 50 N. The fulcrum is at a distance of 20 cm
from the load. Calculate a. the mechanical advantage of the crowbar b. the effort applied at the
other end
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3. A crowbar of length 100 cm is used to lift a load of 50 N. The fulcrum is at a distance of 20 cm
from the load. Calculate a. the mechanical advantage of the crowbar b. the effort applied at the
other end
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Explanation:
total length=100cm/100= 1m
load=50N
LOAD DISTANCE=20CM/100=0.2M
EFFORT DISTANCE=TOTAL - LOAD.D
100-20
80CM/100=0.8
E×ED=L×LD
E×0.8=50×0.2
E×0.8=25
E=50/0.8
E=62.5
NOW,
MA=L/E
= 20/62.5
= 0.32
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