Published by:
CGP EDU Academic Team
Published on: September 12, 2026
Block A, as shown in the figure, shown here hangs by a cord from dynamometer (spring balance) 
and is submerged in a liquid C, contained in a beaker B. The mass of the beaker is 
and the mass of liquid is 1.5 
. The readings of dynamometers 
and 
are 
and 
, respectively. What will be the readings of 
and 
if block A is pulled out of liquid?
A
will read 
and 
will also read 
B
will read 
and 
will read 
C
will read 
and 
will read 
D
will read 
and 
will read 
Text Solution
Verified by ExpertsThe correct answer is:
C
Step 1: Understand the system: If block A is submerged in liquid C, it experiences a buoyant force that reduces the effective weight measured by the dynamometer D1. The reading on the dynamometer D1 while submerged will be A - F_b (buoyant force).
Step 2: When the block is pulled out, it will no longer experience the buoyant force, thus the reading on D1 will equal the actual weight of block A. D2 will change according to the force exerted by the additional weight (mass of A) on the beaker, thus reading increases.
Step 3: Analyze the provided options: Option C matches the expected readings of D1 and D2 when block A is pulled out of the liquid.
Therefore, the answer is C.
Step 2: When the block is pulled out, it will no longer experience the buoyant force, thus the reading on D1 will equal the actual weight of block A. D2 will change according to the force exerted by the additional weight (mass of A) on the beaker, thus reading increases.
Step 3: Analyze the provided options: Option C matches the expected readings of D1 and D2 when block A is pulled out of the liquid.
Therefore, the answer is C.
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