Question

(b) A body weighs 450 gf in air and 310 gf when completely immersed in water. Find:
i. The volume of the body
ii. The loss in weight of the body, and
iii.The upthrust on the body.
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Answer 1

Answer:

Explanation:

Given: weight of the body in air=450kgf

Weight of the body in water =310kgf

Assumption: density of water = 1gcm-3

(i) To find the volume of the body

Volume of the body = density of water x loss in weight

= 1 x (difference in the body weight)

= 1 x (450-310)

= 140 cm3

(ii) To find the loss in weight of the body

Loss in weight = weight of the body in air – weight of the body in water

= 450 – 310

= 140 gf

(iii) To find the upthrust on the body

Upthrust = loss in weight = 140gf

Assumption made is density of water is 1g cm-3

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