Lab 8 Buoyant Force & Archimedes Principle PHY250L
Student Name: Giovana Costarelli
Access Code (located on the underside of the lid of your lab kit): AC-KW8OU6
Lab Report Format Expectations
Utilize college level grammar and formatting when answering text based questions.
Report all equations in a proper mathematical format, with the correct signs and symbols.
Submissions with incomplete or improperly formatted responses may be rejected.
Pre-Lab Questions
1. Archimedes' principle is a fundamental concept in fluid mechanics and relates directly to the
buoyant force. Archimedes' principle states that:
"Any object, wholly or partially immersed in a fluid, is buoyed up by a force equal to the weight of the
fluid displaced by the object."
In your own words, explain the Buoyant Force as it relates to Archimedes Principle. Ensure that you
discuss this in terms of the equation for Buoyant Force.
Archimedes' Principle states that any object fully or partially immersed in a fluid experiences an
upward buoyant force equal to the weight of the fluid displaced by the object. The buoyant force
(Fb) is given by the equation:
Fb = ρfluid Vdisplaced
ρ fluid is the fluid density ( / ^3),
V displaced is the volume of displaced fluid ( ^3),
is the gravitational acceleration (9.81 / ^2).
,Lab 8 Buoyant Force & Archimedes Principle PHY250L
2. Draw a free-body diagram of a hanging mass before it is submerged in water. Make sure to label
your forces and include your handwritten name in the background.
, Lab 8 Buoyant Force & Archimedes Principle PHY250L
3. Draw a free body diagram of a hanging mass after it is submerged in water. Make sure to label your
forces and include your handwritten name in the background. Which force is the force you measure
with the spring scale?
EXPERIMENT 1: EFFECTS OF DENSITY
Introduction Questions
1. Apply Newton’s second law to your free body diagram from Pre-Lab Question 3 to solve for the
magnitude of the buoyant force.
∑F=ma
Weight (W=mg) acting downward, Buoyant force ( ) acting upward. Since the object is in
equilibrium:
+T=mg
Where is the force measured on the spring scale. Rearranging for :
=mg−T
Student Name: Giovana Costarelli
Access Code (located on the underside of the lid of your lab kit): AC-KW8OU6
Lab Report Format Expectations
Utilize college level grammar and formatting when answering text based questions.
Report all equations in a proper mathematical format, with the correct signs and symbols.
Submissions with incomplete or improperly formatted responses may be rejected.
Pre-Lab Questions
1. Archimedes' principle is a fundamental concept in fluid mechanics and relates directly to the
buoyant force. Archimedes' principle states that:
"Any object, wholly or partially immersed in a fluid, is buoyed up by a force equal to the weight of the
fluid displaced by the object."
In your own words, explain the Buoyant Force as it relates to Archimedes Principle. Ensure that you
discuss this in terms of the equation for Buoyant Force.
Archimedes' Principle states that any object fully or partially immersed in a fluid experiences an
upward buoyant force equal to the weight of the fluid displaced by the object. The buoyant force
(Fb) is given by the equation:
Fb = ρfluid Vdisplaced
ρ fluid is the fluid density ( / ^3),
V displaced is the volume of displaced fluid ( ^3),
is the gravitational acceleration (9.81 / ^2).
,Lab 8 Buoyant Force & Archimedes Principle PHY250L
2. Draw a free-body diagram of a hanging mass before it is submerged in water. Make sure to label
your forces and include your handwritten name in the background.
, Lab 8 Buoyant Force & Archimedes Principle PHY250L
3. Draw a free body diagram of a hanging mass after it is submerged in water. Make sure to label your
forces and include your handwritten name in the background. Which force is the force you measure
with the spring scale?
EXPERIMENT 1: EFFECTS OF DENSITY
Introduction Questions
1. Apply Newton’s second law to your free body diagram from Pre-Lab Question 3 to solve for the
magnitude of the buoyant force.
∑F=ma
Weight (W=mg) acting downward, Buoyant force ( ) acting upward. Since the object is in
equilibrium:
+T=mg
Where is the force measured on the spring scale. Rearranging for :
=mg−T
