(a) To which class of lever does it belong?
(b) If FA = 80 cm, AB = 20 cm, find its mechanical advantage.
(c) Calculate the value of E.
Solutions:
(a) It belongs to class II lever.
(b) According to the question-
FA = 80 cm ; AB = 20 cm
So, we have
BF = FA + AB = 100 cm
Expression for Mechanical advantage is
M.A. = BF / AF = 100 / 80
M.A. = 1.25
(c) Similarly, the expression for Effort is
Effort (E) = Load (L) / M.A. = 5 / 1.25
Effort = 4 kgf