Question

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Answer 1

A lever amplifies an input force to provide a greater output force, which is said to provide leverage. The ratio of the output force to the input force is the mechanical advantage of the lever. As such, the lever is a mechanical advantage device, trading off force against movement.

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Answer 2

Answer:

Given : समीकरण निकाय 2x+5y=0 तथा kx + 10y = 0 का अद्वितीय हल

Pair of linear equations 2x+5y=0 and kx + 10y = 0 has unique solution

To Find : K का मान ज्ञात कीजिए

Value of K

Solution:

a₁x + b₁y = c₁

a₂x + b₂y = c₂

अद्वितीय हल / unique solution

a₁/a₂ ≠ b₁/b₂

2x+5y=0

kx + 10y = 0

2/k ≠ 5/10

=> 2/k ≠ 1/2

=> k ≠ 4

k ∈ R - { 4 }