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LEVERS. P3 (3.1 Single Third-Class Lever (load further from fulcrum than…
LEVERS. P3
3. THIRD-CLASS & LINKED LEVERS
effort, forces effort & load in same direction
3.1 Single Third-Class Lever
load further from fulcrum than effort
lots of effort needed
bicep curls, effort & load both lifted
no MA
e.g. man sweeping
3.2 Linked Third-Class Lever
E < L
no MA
not strong
used for:
pinching
sweeping objects
gripping
EXAMPLES
office light-duty stapler
fixed at end of linkage
L > E; no MA
tweezers
load gripped at furthest point from fulcrum
more force applied
no MA < 1