Transcript Warm Up Day 14

Unit Test Review
Forms of Potential Energy
1. Name the Five Forms of Potential Energy.
2. Explain when each form is storing energy.
(Describe the forces involved.)
3. Which of the forms of Potential Energy can
you calculate an actual amount.
Unit Test Review
Forms of Kinetic Energy
1. Name the Five Forms of Kinetic Energy.
2. Explain when each form has kinetic energy.
(Describe what is moving.)
3. Which of the forms of Kinetic Energy can you
calculate an actual amount or change.
Unit Test Review
Law of Conservation of Energy
State the complete Law of Conservation of
Energy. Check your answer with what is
written in the glossary of your book
Unit Test Review
Law of Conservation of Energy
Critique the following statement:
“If one drops a book, that book obviously loses
energy when it reaches the floor. Therefore,
the law of conservation of energy is incorrect.”
Unit Test Review
Mechanical Systems
What forms of energy do we take into
consideration when we discuss mechanical
systems that are 100% efficient?
Unit Test Review
Work – Energy Theorem
1. What does the work- energy theorem state?
2. Can work have positive or negative values?
3. The work done on a ball to make it roll is
positive/negative work.
4. The work done by a ball to bring it to a stop
is positive/negative work.
Unit Test Review
Work – Energy Theorem
1. Use the work- energy theorem to describe the
energy transfer of a ball getting a push and
then rolling to a stop.
2. Draw energy diagrams of the ball.
Unit Test Review
Ball Bounce
1. Draw the energy diagrams of on complete
ball bounce. (4 diagrams)
2. The ball has a mass of 2kg and drops at 5
meters and bounces back up to 3 meters.
A. Find the initial GPE and final GPE.
B. Find the velocity before it hits the floor and as it
leaves the floor.
C. Find its efficiency.
Unit Test Review
Thermal Energy
How do you calculate the amount of heat that is
transferred to water?
Unit Test Review
Thermal Energy
A pot of 500 g of water is placed on a gas stove
and is heated from 15 oC to 50 oC .
1. How much energy is transferred to the
water?
2. If 90,000 Joules of CPE is used to heat the
water, how efficient is the gas stove?
Energy Transfer Diagrams
Draw an energy diagram of
1. A solar cell.
2. A speaker.
3. A coil of wire.