The diagram below shows a lever in use. - Noon Academy

The diagram below shows a lever in use.

Class 10 | ICSE | Machines | Physics | Selina

The diagram below shows a lever in use.

(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

i

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