Page 106 - Physics

Physics for Secondary Schools

Verifi cation of Archimedes’ principle 2. Using a digital balance, measure

To verify the Archimedes’ principle, the mass of a dry empty measuring
perform the following activity. cylinder, and record its mass.
3. Pour water into a eureka can up to
Acti vity 5.3
its spout level.
Aim: To verify the 4. Place the measuring cylinder under
Archimedes’ Principle. the spout of the eureka can.
Materials: Beaker, eureka can, 5. Weigh the stone when it is totally
spring balance, immersed in water and record its
measuring cylinder, weight. Wait until all the displaced
stone, water and digital water overfl ows into the measuring
balance. cylinder.
The setup is shown in Figure 5.5
6. Weigh the measuring cylinder
containing the displaced water.
Record its weight.

Spring Questions
balances (a) Determine the mass of the displaced

water.
Stone immersed (b) Calculate the weight of the displaced
in water water.
(c) Calculate the upthrust exerted by
Eureka can
water on the stone.
Spout (d) How does the upthrust relate to the

weight of the displaced water?
(e) Using the results from this activity
and your own words, state the
Stone in Archimedes’ principle.
the air
Displaced
water
In Activity 5.3, you observed that upthrust
is equal to the weight of the displaced fl uid.
Figure 5.5
This observation verifi es Archimedes’
Procedure principle, which applies to objects of
1. Measure the weight of the stone in all densities. It is important to note that
the air using a spring balance and upthrust depends on the weight of the fl uid
record its weight. displaced.

100
Student’s Book Form One

Physics Form 1 Final.indd 100 16/10/2024 20:56