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Energy and the Roller Coaster

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What is the relationship between speed and height on a roller coaster? ... Use a photogate to measure the speed at different places along the roller coaster. ... – PowerPoint PPT presentation

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Title: Energy and the Roller Coaster


1
Energy and the Roller Coaster
  • How is motion on a roller coaster related to
    energy?

2
Key Questions
  • What is the relationship between speed and height
    on a roller coaster?
  • How is energy conserved on a roller coaster?

3
Learning Goals
  • Students will
  • Discover the relationship between speed and
    height on a roller coaster
  • Describe how energy is conserved on a roller
    coaster

4
Vocabulary
  • Speed
  • Potential energy
  • Kinetic energy
  • Law of conservation of energy

5
Animation of how PE is converted to KE in a
pendulum
  • This web site demonstrates the concept of
    conservation of energy in a pendulum
  • http//www.physicsclassroom.com/mmedia/energy/pe.h
    tml
  • This is an excellent site to review Physical
    Science concepts

6
Set Up and Materials
  • Each group should have
  • One physics stand
  • One roller coaster with a steel marble
  • One CPO time and one photogate
  • A metric ruler
  • A copy of the investigation and answer sheet
  • Each student student should have
  • A calculator

7
Section 1 Making a prediction (Hypothesis)
  • Use what you know to predict the following
  • At which place do you think the marble moves the
    fastest (how is this similar to the pendulum)?
  • What is the relationship between the speed and
    height of the marble on the roller coaster?

8
Section 2 Measuring the speed of the marble
  • Use a photogate to measure the speed at different
    places along the roller coaster.
  • Recall that the speed at photogate A will be
    calculated using the formula Sd/t.
  • This means that the time at A will be recorded
    using the CPO timer and the distance is the width
    of the steel marble (1.9 cm).

9
Section 2 Data Table
10
Section 3 Energy Conservation
  • Energy can be converted to other forms of energy
    but can not be created or lost.
  • Consider the pendulum example

11
Section 3 Energy Conservation
12
Section 4 Graphing speed and height
  • Use your measurements to make a graph showing the
    relationship between height and speed.
  • Follow the example given in your lab
    investigation page.
  • Answer the questions given.

13
Section 5 Assessment
  • Finish the lab assessment questions and turn in
    your lab work.
  • Study lab quiz
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