Question

As Fig. shows, `S_(1)` and `S_(2)`, are spring balances. Block `A` is hanging from spring balance `S_(1)` and immersed in liquid `L` which is contained in beaker `B`. The mass of beaker `B` is `1 kg` and mass of liquid `L` is `1.5 kg`. Balances `S_(1)` and `S_(2)` reads `2.5 kg` and `7.5 kg`, respectively. What will be the readings of `S_(1)` and `S_(2)` when block `A` is pulled up out of the liquid. Find the reading of `S_(1)` and `S_(2)`?

A. 7.5 kg
B. 2 kg
C. 3.5 kg
D. 2.1 kg

Answer 1

Correct Answer - A
Balance D reads weight minus buoyancy force whereas E reads weight and reaction forces.