The photo shows a roller coaster. Assume that the system is closed. A
B
D
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Which roller-coaster car has the least potential energy due to gravity?
O A. Car A
O B. Car B
O C. Car C
O D. Car D

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d. a round-trip ride to school and back

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

Select three sports that require participants to be highly fit before the beginning a: snowboarding b: skydiving c: rock climbing d: bungee jumping e: free diving f: hiking