A crowbar of length 45cm is used to lift up a rock weighing 16kg from the ground. If the fulcrum is 5 CM from the rock, what is the effort needed (in kgf) to move the rock? Answer should come : 2 kgf
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Given,
Total Length of Crowbar = 45 cm
Load = 16 kgf
Load Arm = 5 cm
Effort Arm = (45-5) cm
= 40 cm
M.A = Effort Arm/Load Arm
= 40/5
= 8
M.A = Load/Effort
8 = 16/Effort
Effort = 2 kgf
The Effort is 2 kgf.
I hope this helps.
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