Question

one side of weighing pan is coming down
​

Answer 1

Answer:

W

1

W

2

As pan and beam are weightless, error must be in length of beams.

So, both pans are at different distance from support.

Let beam on left be l

1

and beam on right be l

2

.

Suppose we put weight W in pan 1, then weight reads W

1

, that means, weight in pan 2 is W

1

.

So, Wl

1

=W

1

l

2

-------(1)

Now when weight W is kept in pan 2, it reads W

2

, so weight in pan 1 now is W

2

.

So, W

2

l

1

=Wl

2

--------(2)

Dividing,

We get,

W

2

W

=

W

W

1

W

2

=W

1

W

2

W=

W

1

W

2

So, option A is correct.