While standing at the top of the stairs, you have a potential energy of 40 Joules. If you walk all the way down the stairs, what would your potential energy be at the bottom of the stairs?
A. 0 Joules
B. 20 Joules
C. 40 Joules
D. 80 Joules
Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content
What do you already know about potential and kinetic energy? What other information is related to the question?
Choose Answer
Do you have all the information needed to answer the question?
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A. 0 Joules
Clarify Question
What is the key concept addressed by the question?
· The question asks for you to identify the how muchpotential energy exists after walking down stairs.
What type of thinking is required?
· You are being asked to take what you already know about different states of energy and apply your understanding to determine how much potential energy you would have at the bottom of stairs.
Gather Content
What do you already know about potential and kinetic energy? What other information is related to the question?
· To solve this problem you’ll need to apply what you know about different states of energy and use this to determine how much potential energy exists after walking down stairs to the bottom.
· Remember that potential energy is stored energy and kinetic energy is from things in motion. How are potential and kinetic energy related to each other?
Choose Answer
Do you have all the information needed to answer the question?
· At this point you should have everything you need to answer the question. Of the available options, which are involved with motion and which with rest? Hopefully it is clear that any answer with a number has some level of potential energy associated with it.
· When the person was at the top of the stairs they had maximum potential energy. As they walked down the stairs this potential energy became converted into kinetic energy. Ultimately, when they arrived at the bottom of the stairs, all the potential energy has been converted, and since they aren’t moving, has no potential energy left.
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
· Answering this question correctly depended on your ability to use your understanding of potential and kinetic energy. If you got an incorrect answer, did you remember that energy has potential and kinetic forms? Did you remember that potential energy is stored energy, and kinetic energy is energy of motion? Were you able to apply that understanding to determine that walking to the bottom of stairs converted all your potential energy and so would have 0 Joules?
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