Question

4)
18.
A brick is being weighed with spring balance. It is weighed on ground, under water and on moon. T.
readings of the spring balance are W, W, and W, respectively on them. Then
A) W, > W2
B) W, >W
C) W, = W
D) W, = W2
1) all are correct 2) A, B, C are correct 3) B, C, D are correct 4) none of these
Th
3​

Answer 1

Answer:

ANSWER

By Archimedes Principle, an object immersed(partially or fully) in a fluid experiences a loss in weight, which is given by the weight of the fluid displaced by the body.

For the given iron ball, the weight measured in air is W

1

=(m

ball

−ρ

air

V

ball

)g

Similarly, weight measured in water is W

2

=(m

ball

−ρ

water

V

ball

)g

We know that, ρ

water

>ρ

air

Hence, W

2

<W

1

i.e., Weight measured in air is more than that in water.