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Web Activities
UNIT 2 - ENERGY AND MOMENTUM
Chapter 4 - Work and Energy
4.3 Gravitational Potential Energy at
Earth's Surface
Case Study: An Environmentally-Friendly
Way of Generating Electricity
4.4 The Law of Conservation of Energy
Activity 4.4.1 Applying the Law of Conservation
of Energy (p.220)
Activity 4.5.1 Achieving a Smooth and
Safe Ride (p. 223)
Chapter 4 - Work and Energy
4.3 Gravitational Potential Energy at Earth's
Surface
Practice (p. 191)
- A barrel of oil contains about 6.1 X 109 J of chemical potential
energy.
- Determine to what height above the ground this energy could
raise all the students in your school. State all your assumptions
and show all your calculations.
- How many joules of chemical potential energy are stored in
each litre of oil? (Hint: You will have to determine how many
litres there are in a barrel.)
WILL
LIMITS OF THE EARTH'S RESOURCES CONTROL HUMAN NUMBERS?
A discussion paper on the amount of energy the world uses, in specific
numbers. Look at the "Status of World Environmental Resources"
and specifically "Energy Resources."
Case Study: An Environmentally-Friendly Way
of Generating Electricity
Practice (p. 193)
- (c) Canada also has run-of-the-river generating stations. Research
this way of generating electricity in Canada. Describe any differences
between the Chukha plant and Canadian designs.
(d) Research more about Bhutan's generation of electrical energy,
from the Internet and other appropriate publications, and report your
findings.
(i) What are the sources of water in Bhutan?
(ii) Describe how Bhutan is trying to preserve its environment while
adapting to growing energy needs.
Energy
Facts: Hydro-Electric Power
Bhutan
Country Analysis
Encarta:
Bhutan
4.4 The Law of Conservation of Energy
Section 4.4 Questions (p. 202)
- In medieval times, the weapon of choice for military engineers
was a trebuchet, a mechanical device that converted gravitational
potential energy into the kinetic energy of a large rock. Figure 9
shows the design of a gravity-powered trebuchet used to hurl projectiles
at castle walls. Find out more about this device, and explain why
it is a good illustration of the law of conservation of energy.
The
Virtual Trebuchet
An applet-based trebuchet simulator with suggested exercises to
plug into it.
The
Physics of the Trebuchet
A page dedicated to a science project on the trebuchet. Lots of
diagrams and good physics analysis of the apparatus.
The
Grey Company Trebuchet Page
Many different configurations of the Trebuchet and a historical
analysis of its use.
Activity 4.4.1 Applying the Law of Conservation
of Energy (p.220)
- Use the Internet and other resources to research the design and
operation of at least two or three different designs of gravity clocks.
Record your notes for reference.
Rolling
Ball Clock
A description of how this clock works with links to pictures and
other sites that are dedicated to rolling ball clocks.
General
Gravity Clocks
This site shows a gravity clock and gives some relevant print resources.
Activity 4.5.1 Achieving a Smooth and Safe
Ride (p. 223)
- Research the design features of an effective suspension system.
Record notes for reference.
Automobile
Ride, Handling, and Suspension
This site looks at the how suspension systems minimize discomfort
in driving. It does a nice job applying physics to workings of suspension
systems.
Car
Physics
Exactly as the title states, this site looks at everything physics
about cars, not just suspension systems. It is actually intended
for computer game developers.
Suspension
II: Still Rocking After All These Years
This site describes a car's suspension system. There are some very
good photo's down the left hand side and does a good job of describing
the main parts and how they work.
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