Question

The spring balance A reads 2 kg with a block of mass 'm' suspended from it. A balance B reads 5 kg when a beaker with liquid is put on the pan of the balance. The two balances are now so arranged that the hanging mass is inside the liquid in the beaker as shown in the figure. In this situation,

• A. the balance A will read more than 2 kg
• B. the balance B will read more than 5 kg
• C. the balance A will read less than 2 kg
• D. the balance A and B will read 2 kg and 5 kg, respectively

Answer 1

Answer: (B), (C)

The correct options are
B the balance B will read more than 5 kg
C the balance A will read less than 2 kg

Block will experience buoyant force in the upward direction.
The reaction of this force will be on liquid (or liquid + beaker system) in downward direction.