A piece of iron has a weight of 3.5 N when it is in air and 2.0 N when it is submerged into water. What is the buoyant force on the piece of iron?

1.0 N

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3.5 N

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2.0 N

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1.5 N

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Solution

The correct option is D 1.5 N
The net weight of iron measured in water=
$m g - B = W_{a i r} - B$
$⟹ 2 N = 3.5 N - B$
$⟹ B = 1.5 N$

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A piece of iron has a weight of 3.5 N when it is in air and 2.0 N when it is submerged into water. What is the buoyant force on the piece of iron?

The correct option is D 1.5 NThe net weight of iron measured in water=mg−B=Wair−B⟹2N=3.5N−B⟹B=1.5N

The correct option is D 1.5 N
The net weight of iron measured in water=
$m g - B = W_{a i r} - B$
$⟹ 2 N = 3.5 N - B$
$⟹ B = 1.5 N$