Question

A block of wood is so loaded that it just floats in water at room temperature. What change will occur in the state of floatation, if (a) some salt is added to water (b) water is heated? Given reason.

ICSE Class 9 Physics Chapter Upthrust in Fluids,Archimedes Principle and Floataion

Answer 1

Answer:

(a) if some salt is added no Change will occur to the block of wood because the higher density the heavier weight object will floats on water

(b) if water is heated there will be effect on the log of wood it will float on water vigorously

Answer 2

Dear Student,

◆ Answer with explaination -

Floatation of the wooden block in water depends upon upthrust on it by water.

(a) When some salt is added to water -

• When some salt is added to water, density of water increases.
• This increases upthrust on block and wooden block moves up in its floating state.

(b) If water is heated -

• When water is heated, density of water decreases.
• This decreases upthrust on block and wooden block sinks more in the water.

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