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Energy Skate Park Basics PhET Activity, Exercises of Physics

Review Questions with Answers.

Typology: Exercises

2021/2022
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Name:&KEY!
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Energy'Skate'Park'Basics'PhET'Activity'
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1.&Explore&the&simulation.&&
Question:&What&can&you&change&about&the&simulation?&
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You&can&make&the&simulation&go&in&slow&motion.&You&can&display&different&things&(speed,&bar&graph,&grid,&etc.).&
You&can&reset&the&simulation&and&pause&it.&&
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2.'Investigate&how&the&potential&and&kinetic&energy&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:&&
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3.&Explore&how&the&potential&and&kinetic&energy&change&as&the&height&of&the&skateboarder&changes.&Fill&in&the&
table&based&on&your&observations.&&
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Height'of'Skater'(m)'
What'is'greater?'(circle'your'answer)'
6&
Kinetic&Energy&&&&&&&&&&&&&&&&&Potential&Energy&
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Kinetic&Energy&&&&&&&&&&&&&&&&&Potential&Energy&
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Kinetic&Energy&&&&&&&&&&&&&&&&&Potential&Energy&
0&
Kinetic&Energy&&&&&&&&&&&&&&&&&Potential&Energy&
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Question:'What&conclusions&can&you&make&about&how&the&height&of&the&skater&influences&the&potential&energy&
of&the&skater?&&
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The&higher&the&skater&is&the&more&potential&energy&he&has.&As&his&height&decreases,&his&potential&energy&
decreases&and&his&kinetic&energy&increases.&&
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4.&Explore&how&the&skater’s&change&in&speed&relates&to&the&potential&and&kinetic&energy&of&the&skater.&Fill&in&the&
table&based&on&your&observations.&&
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Review:''(fill'in'the'blanks)''
Potential&Energy&is&the&energy&stored&in&an&object&because&of&its&position.&
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Kinetic&Energy&is&the&energy&of&motion.&&&
As&the&skateboard&rolls&down&the&ramp&it&loses&potential&energy&and&gains&&
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kinetic&energy.&The&total&energy&of&the&skateboarder&remains&constant.&&
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Name: KEY Energy Skate Park Basics PhET Activity

  1. Explore the simulation. Question: What can you change about the simulation? You can make the simulation go in slow motion. You can display different things (speed, bar graph, grid, etc.). You can reset the simulation and pause it.
  2. Investigate how the potential and kinetic energy 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:
  3. Explore how the potential and kinetic energy change as the height of the skateboarder changes. Fill in the table based on your observations. Height of Skater (m) What is greater? (circle your answer) 6 Kinetic Energy Potential Energy 4 Kinetic Energy Potential Energy 2 Kinetic Energy Potential Energy 0 Kinetic Energy Potential Energy Question: What conclusions can you make about how the height of the skater influences the potential energy of the skater? The higher the skater is the more potential energy he has. As his height decreases, his potential energy decreases and his kinetic energy increases.
  4. Explore how the skater’s change in speed relates to the potential and kinetic energy of the skater. Fill in the table based on your observations. Review: (fill in the blanks) Potential Energy is the energy stored in an object because of its position. Kinetic Energy is the energy of motion. As the skateboard rolls down the ramp it loses potential energy and gains kinetic energy. The total energy of the skateboarder remains constant.

Speed What is greatest? (Potential or Kinetic Energy) What is lowest? (Potential or Kinetic Energy) Kinetic Energy Potential Energy Potential Energy Kinetic Energy Potential Energy Kinetic Energy Question: How does the speed relate to the potential and kinetic energy of the skater? As the skater’s speed increases, the kinetic energy increases. As the speed decreases, the kinetic energy increases.

  1. Find ways to change the total energy bar. If you change the track, explain what makes the track different from the others (Hint: where does the skate boarder start?). Use the table below to record your observations. What did you do? The total energy…. (circle your answer) Increase the mass of the skater Increases Decreases Decrease the mass of the skater Increases Decreases Change the track where the skater starts at a higher position Increases Decreases Conclusion: In a few sentences describe what you think the total energy of the skater depends on. Use the tables you filled in during this activity as your evidence. When the skater starts at a higher point, the total energy of the skater increases. When the skater’s mass increases, the total energy increases.