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Lab03: Simulation and Energy
Student #1: Aryan Dixit
Student #2:
Instructions:
Read and print out this document prior to attending the lab. Follow along with the
instructions and answer the questions using complete sentences. Hand in one document per lab
group at the end of the lab period. Note: you must be present to gain credit for the lab.
A) Using Chrome, go to this website, click on “Intro”, and check ‘on’ all of the boxes in
the top right corner.
https://phet.colorado.edu/sims/html/energy-skate-park-basics/latest/energy-skate-park-b
asics_en.html
1. Drag the skateboarder to different heights on the parabolic ramp to run the simulation.
Investigate how the potential and kinetic energies of the skater change as the skater
moves from the top of the ramp to the bottom. Fill in the blanks based on your
observations:
As the skateboard rolls down the ramp it loses
potential
energy and
kinetic
energy. The total energy of the skateboarder remains
constant
.
2. Drag your skater to the 6 m height on the parabolic ramp and run the simulation.
Explore how the potential and kinetic energies change as the height of the skateboarder
changes. Pause the simulation at different heights and fill in the table based on your
observations.
Height of skater (m)
Which is greater? (circle your answer)
2M
Kinetic Energy
Potential Energy
4M
Kinetic Energy
Potential Energy
6M
Kinetic Energy
Potential Energy
0M
Kinetic Energy
Potential Energy
3. What conclusions can you make about how the height of the skater influences the
potential energy of the skater?
Lab03: Simulation and Energy
PHYS 171: Computational Lab for Electricity and Motion
C. Love, Drexel University; edited by R. Kratzer, Drexel University
Page 1 of 6
The higher the skater is on the ramp, the greater their potential energy. As the skater
descends, their potential energy decreases and kinetic energy increases. So, height and
potential energy are directly related: higher height equals more potential energy, and
lower height equals less potential energy.
4. Explore how the skater’s speed relates to her potential and kinetic energies. Pause
the simulation at the given speeds and fill in the table based on your observations.
SPEED 1= KINETIC IS GREATEST. POTENTIAL IS LOWEST
SPEED 2= POTENTIAL IS GREATEST. KINETIC IS LOWEST
SPEED 3= POTENTIAL IS GREATEST. KINETIC IS LOWEST
5. What relationships exist between the speed of the skater and the skater’s potential
and
kinetic energies?
The speed of the skater and their potential and kinetic energies are interconnected. As
the skater gains speed (moves faster), their kinetic energy increases. Conversely, as the
skater loses speed (slows down), their kinetic energy decreases. The skater's potential
Lab03: Simulation and Energy
PHYS 171: Computational Lab for Electricity and Motion
C. Love, Drexel University; edited by R. Kratzer, Drexel University
Page 2 of 6
energy, on the other hand, decreases as they move lower and increases as they move
higher on the ramp. So, when the skater gains speed, their kinetic energy goes up, and
when they change height, their potential energy changes accordingly.
6. Using the parabolic track, adjust the simulation a few different ways so that the total
energy bar changes. Use the table below to record your observations.
What did you do?
The total energy…. (circle your answer)
Changing the total mass to small
Increases
Decreases
Changing the total mass to large
Increases
Decreases
Start point at 6m
Increases
Decreases
Start point at 0m
Increases
Decreases
B) A skater begins at a height of 5 m and rolls along the variable track (see diagram)
with friction. You can choose the friction simulation at the bottom of the screen and the
variable track on the right of the screen. Two students make claims about the changes in
the skater’s energy and motion.
Student A:
As the skater moves along the track, some of her kinetic energy is converted
to thermal energy. She will lose energy causing the total energy of the system to
decrease. Because the total energy of the system decreases, the skater will not be able
to use as much energy to get up the track and will not get back up to her original starting
Lab03: Simulation and Energy
PHYS 171: Computational Lab for Electricity and Motion
C. Love, Drexel University; edited by R. Kratzer, Drexel University
Page 3 of 6
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