Page 32 - Pressure 10 class

Numericals based on Archemede’s Principle

1.Observe the given diagram and answer the following questions;

a. Calculate upthrust experienced by the stone in water.

b. Find out the weight of water displaced by the stone.

c. Calculate the mass of water displaced if 1kg = 10N.

d. On which principle the given figure is based on? State that.

Solution: Given, Weight of the stone in air(W1) = 20N

Weight of stone in water (W2) = 15N

a. Upthrust (U) = W1 – W2 = 20N – 15N = 5N

b. Weight of water displaced = Upthrust = 5N.

c. Mass of water displaced( m) = ?

weight of water displaced = 5N

Then, according to question 10 N = 1 kg

or, 1N = 1/10 kg

or, 5N = 1/10 x 5 = ½ kg = 0.5 kg.

Therefore, mass of water displaced is 0.5kg.

d. This figure is based on Archimedes Principle’s . It states that…………

………………………..

July 30, 2020 Taranath Baral/GC Shiba/Suraj Thapaliya 32