To begin your activity, open this tracker experiment: Snowboard Jump Energy. Watch the movie by clicking on the play button. (The other video controls allow you to “rewind” the video or step forward or backward one frame at a time.) Observe the video and answer the following questions.

Part A
What can you say about the snowboarder’s kinetic energy as he moves?

Part B
Similarly, what can you say about the potential energy of the snowboarder?

Part C
Based on your observations, what can you say about your prediction in Parts A and B above concerning the potential and kinetic energy?

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

What is the weight of a 8-kg substance in n, kn, kg·m/s2, kgf, lbm·ft/s2, and lbf?