Question

A man can crack a nut by applying a force of 100 N a lever of length 0.5 m. What should be the length of the lever if he wants to use a force of 75 N to crack the nut?​

Answer 1

So, to apply the force of 75N length of nut cracker should be 66.6 cm

Answer 2

Step-by-step explanation:

Given:

F₁ = 100 N

L₁ = 0.5 m

F₂ = 75 N

__________

L₂ - ?

According to the rule of moments:

M₁ = M₂

F₁·L₁ = F₂·L₂

The length of the lever:

L₂ = F₁·L₁ / F₂

L₂ = 100·0.5 / 75 ≈ 0.67 m