# Energy and the Roller Coaster - PowerPoint PPT Presentation

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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.