Question

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​

Answer 1

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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