Question

A rod of weight W is supported by two parallel knife edges A and B and is in equilibrium in a horizontal position. The knives are at a distance d from each other. The centre of mass of the rod is at distance x from A. The normal reaction on A is ____________.

विकल्प

• `"Wx"/d`

• `"Wd"/"x"`

• `"W (d - x)"/"x"`

• `"W (d - x)"/"d"`

Answer 1

A rod of weight W is supported by two parallel knife edges A and B and is in equilibrium in a horizontal position. The knives are at a distance d from each other. The centre of mass of the rod is at distance x from A. The normal reaction on A is `"W (d - x)"/"d"`.

Explanation:

For equilibrium,

N₁ d = W (d - x)

`therefore "N"_1 = "W (d - x)"/"d"`