Which of the following relations is correct? \( \mathrm{P} \) (a) M...

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Which of the following relations is correct?
\( \mathrm{P} \)
(a) Mechanical advantage \( =\frac{\text { Effort }}{\text { Load }} \)
W.
(b) Load \( \operatorname{arm} \times \) Effort = Effort \( \operatorname{arm} \times \) Load
(c) Load arm \( \times \) Load = Effort arm \( \times \) Effort
(d) None of these
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