Question

The length of a nut-cracker is 12 cm. A nut, when kept at a distance of 4 cm from its fulcrum, requires an effort of 100 gf to crack it. What force will be required to crack the nut without using the nut-cracker?

Answer 1

Given : Effort arm = 12 cm, Load arm = 4 cm, Effort E = 100 gf, Load L = ?
(Nut-cracker is the lever of second order)

Since, `"Load"/"Effort"=("Effort arm")/("Load arm")`

∴ `"L"/100=12/4`

or L = 300 gf.

Thus, a force of 300 gf is required to crack the nut without using the nut-cracker.