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1. Forces of Fluids
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Q4 of 16 Page 25

A body of weight 1000 N sinks in water. The weight of the liquid overflowed is 250 N.

What will be the weight of the body in water?

Given;

Weight of liquid overflowed = Weight of water displaced by the body


= Buoyant force


= 250 N


Weight in air = 1000 N


Weight of the body in water = Weight in air- Buoyant force


= 1000 N-250 N


= 750 N


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2

A body which floated in water, sank when put in kerosene. Why did it happen?

3

Observe the figures of an object placed in different liquids.


a. Compare the gravitational force and the buoyance acting on the body when it is in the liquids A, B and C.


b. If the body is a solid substance, which is the liquid whose density is equal to that of the solid?

4

A body of weight 1000 N sinks in water. The weight of the liquid overflowed is 250 N.

A body of the same weight as above floats in water. What is its weigh in water? What will be the weight of the water displaced?

5

The area of one end of a U-tube is 0.01 m2 and that of the other end is 1m2. When a force was applied on the liquid at the first end the force experienced at the other end is 20000 N. What is the force applied on the liquid at the first end?

Questions · 16
1. Forces of Fluids
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