Name: __________________________
Date: __________________
Archimedes’ Principle: Getting
Ready to Calculate Buoyancy
Archimedes’ principle states that buoyant force is equal to
the weight of water that is displaced by an object.
Keep in mind,
This means that 1 mL of water is equal 1 g of water.
1. Try this!
What volume of water is displaced by this hammer? ______________
What mass of water is displaced by
this hammer? ____________
Given the mass of the ​water displaced
by the hammer, ​can you calculate the
water’s weight?
Note: This experiment was done on
Planet Earth!
Weight of displaced water =
Buoyant force!
2. Calculate the weight of water in each of the situations below:
a. 50 mL of water:
b. 1 L of water:
c. 500 mL of water:
d. 3 L of water:
e. 10 mL of water:
f. 10 L of water:
3. Which of the examples above would produce the greatest buoyant force?
4. Drawing force diagrams:
Draw proper force diagrams for each of the examples below based on the fact that they
are floating, sinking or at equilibrium.
More on Force and Motion!
5. The students in the diagram below are wearing ice skates and are standing on a
surface of ice with the palms of their hands touching and their arms bent. The ice
surface offers little resistance.
A. If both push toward each other at the same time by straightening their arms out,
describe how the students will move as a result and why they will move as you
described.
B. Draw force arrows on the diagram above to demonstrate your understanding.
6. In the image below, the man is pushing on his car to try and move it out of the road.
The arrow shows the direction of the pushing force.
There are two other forces that are acting on the car.
Identify the two forces, other than the man,
acting on the car and explain the effect and
direction of those forces.
Draw and label all forces on the image.