An object hanging from a spring balance weighs 50 N in air. When the object is lowered
into water, it is found to weigh 40 N. [ 3 point ]
a) What is the upthrust on the object?
b) What are the weight and mass of water
displaced?
c) What is the density of the object?
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3
Answer:
Given,
Weight of the spring =0.1N
Spring reading in water =0.08N
Since Spring reading is reducing, it means Buoyant force =0.02N
F
B
=0.02= Volume of fluid displaced (Density of water) ×g=V×10
3
×10
=>V=
10
4
0.02
m
3
=0.02×
10
4
10
6
cc
3
=2cm
3
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