Question

When the weight of a body is greater than the weight of the liquid displaced, the body will
(a) float
(b) sink
(c) float partially outside
(d) first go down then come up

  • Category: Upthrust in Fluids Archimedes' Principle and Floatation Class 9 ICSE
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Answer

(b) sink

Reason — Two forces act on a body immersed in a liquid:

  1. weight of the body acting vertically downwards and
  2. upthrust acting vertically upwards.

Upthrust is equal in magnitude to the weight of the liquid displaced. When weight of a body is greater than the weight of the liquid displaced, implies downwards force is more than the upwards force, hence the body sinks.

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