Question

State Archimedes principle ? How do you prove it experimentally

Answer 1

Archimedes’ principle: When a body is immersed fully or partially in a fluid, it experiences an upward force that is equal to the weight of the fluid displaced by it.

Verification of Archimedes’ principle

Apparatus: Spring balance, measuring cylinder, any irregular small object, thread, water

Procedure

1. Fill the measuring cylinder with water till some level. Note this reading as v1.

ii. ‘Veigh the object in air using a spring balance and note the reading w1.

iii. Immerse the object into the water in the measuring cylinder. Note the weight, w2 from the spring balance and the volume of water, v2 in the cylinder.

According to Archimedes’ principle Weight loss of an object when immersed in water = Weight of the water displaced

w - V x D
w1- w2= (v2-v1)xD

w1-w2 = (v2 - v1) x 1 (Density of water = I g/cm3) 

W1- W2 =v2-v 1

Answer 2

Archimedes principle states that when a body is immersed in a fluid it experiences an upward force of buoyancy equal to the weight of fluid displaced by the immersed position of the body