The mechanical advantage of a machine is 4. When a load of 12.5N acts on it, identify the class of lever that the machine belongs to.
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(i) A - Single Movable Pulley, B - Single Fixed Pulley.
(ii) To change the direction of force applied i.e., effort can be applied in a more convenient direction.
(iii) Given: L=20kgf
In equilibrium, L=2T and Effort E=T
∴ Effort needed, E=
2
L
=
2
20kgf
=10kgf
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