Question

a pair of tweezers of length 15 cm is used to lift a ball of cotton weighing 1g. if the effort is applied midway between the ends of the tweezers, what effort (in kgf) will have to be applied to lift the ball of cotton?
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Answer 1

Answer:

Load=1.5kgf

Load arm-20cm

Effort arm=15cm

Effort 20*1.5/15-2.0kgf

The fulcrum in tongs is the joint end of

the arnm