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Web Activities
UNIT 1 - FORCES AND MOTION: DYNAMICS
Chapter 3 - Circular Motion
3.2 Analyzing Forces in Circular Motion
3.3 Universal Gravitation
3.4 Satellites and Space Stations
Careers
Chapter 3 Review (p. 161)
Chapter 3 - Circular Motion
3.2 Analyzing Forces in Circular Motion
Practice (p. 137)
- Research the origin and design of Foucault's pendulums. Where
is the Foucault pendulum closest to your home? (Hint: Science centres
and university astronomy or physics departments may have a demonstration
pendulum in operation.)
About
Focault's Pendulum
Find out everything from how Foucault invented the pendulum to why they
prove the earth rotates. Keep your eyes open for animations and rollovers!
(Java enabled browser needed.)
The
Foucault Pendulum
A site from the university of Guelph discussing how the Foucault Pendulum
came to be, how it works, and some of the data it has generated.
The University of Louisville, Foucault Pendulum Page
Along with descriptions, there are good notes on how the Foucault Pendulum
was built and some great photographs.
Section 3.2 Questions (p. 138)
- Centrifuges are used for separating out components in many mixtures.
Describe two applications of centrifuges from one of the following
areas: the clinical analysis of blood, laboratory investigations of
DNA and proteins, the preparation of dairy products, and sample analyses
in geology.
Blood
Sample and Centrifuge
A picture and a description of blood centrifuge.
On-line
Encyclopedia
Food
and Agricultural Organization of the United Nations - Milk and Milk
Products
Look specifically under the section of processing.
3.3 Universal Gravitation
Practice (p. 141)
- In the past, Pluto has been known as the ninth planet in the
solar system. Recently, however, it has been suggested that Pluto
should be classified as a body other than a planet. Research and write
a brief report on Pluto's discovery, and also the reasons for the
recent controversy over Pluto's planetary status.
Pluto:
History
CNN:
Pluto and its Planetary Status
When
is a Planet not a Planet?
Section 3.3 Questions (p. 144)
- A geosynchronous satellite must remain at the same location above
Earth's equator as it orbits Earth.
- What period of revolution must a geosynchronous satellite
have?
- Set up an equation to express the distance of the satellite
from the centre of Earth in terms of the universal gravitational
constant, the mass of Earth, and the period of revolution around
Earth.
- Determine the value of the distance required in (b).
- Why must the satellite remain in a fixed location (relative
to Earth's surface)?
- Research the implications of having too many geosynchronous
satellites in the space available above the equator. Summarize
your findings in a brief report.
Geosynchronous
Orbit
CNN:
Space Junk could Clog Key Orbital Paths
The
Danger of Space Junk
3.4 Satellites and Space Stations
Section 3.4 Questions (p. 151)
- a. Choose a toy that involves motion and describe how you think
its operation on the ISS would differ from its operation on Earth.
b. Research which toys have been taken into space for physics experiments.
Describe some of the results of these experiments.
The
Physics of Toys
Living
in Space - Space Fun
A site dedicated to the fun that astronauts have in space. Includes
videos of some of the games the astronauts play and how their toys react
in space.
Careers
Practice (p. 155)
- Identify several careers that require knowledge about forces
and motion. Select a career you are interested in from the list you
made or from the careers described above. Imagine that you have been
employed in your chosen career for five years and that you are applying
to work on a new project of interest.
- Describe the project. It should be related to some of the
new things you learned in this unit. Explain how the concepts
from this unit are applied in the project.
- Create a resume listing your credentials and explaining why
you are qualified to work on the project. Include in your resume:
- your educational background: what university degree or
diploma program you graduated with, which educational institute
you attended, post-graduate training (if any)
- your skills
- your duties in previous positions
- your salary expectations
Monster.ca
Workopolis.com
Jobs.net
These sites are major job searching sites for Canada. Look for careers
in the Engineering and Science field.
Chapter 3 Review (p. 161)
- In April 2001, an automobile race on a 2.4-km oval racetrack
in Forth Worth, Texas, was cancelled because of complaints of danger
by the drivers. At the high speeds involved, the drivers experienced
nearly twice as great as the forces on most racetracks. Find out why
the racetrack was so dangerous and why the race was cancelled. Explain
the physics of the situation, referring to the banking angle of the
track and the net forces on the drivers.
Texas
Motor Speedway, Fort Worth Texas
This is the official site of the speedway. Click on the ABOUT TMS navigation
link and choose "FACTS" for the dimensions of the track. Under
the TMS Timeline, look at the events at the end of April, 2001. Look
at the SPEED CHART to get an idea of how fast the cars are going!
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