A 900 kg roller coaster car starts at point A, then travels 125 ft at 40.0° below the horizontal to point B. (a) Taking point B to be the level where the gravitational potential energy of the car-Earth system is zero, what is the potential energy (in J) of the system when the car is at points A and B, and the change in potential energy (in J) as the coaster moves between these points? at point A 168241.5 X J at point B ✓ J change in potential energy X J 0 -168241.5 (b) Repeat part (a), setting the zero configuration with the car at point A. at point A 0 at point B change in potential energy -168241.5 -168241.5 J X J X J

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Chapter1: Units, Trigonometry. And Vectors
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A 900 kg roller coaster car starts at point A, then travels 125 ft at 40.0° below the horizontal to point B.
(a) Taking point B to be the level where the gravitational potential energy of the car-Earth system is zero, what is the potential energy (in J) of the system when the car is at points A and B, and the
change in potential energy (in J) as the coaster moves between these points?
168241.5
X J
J
X J
at point A
at point B
change in potential energy
0
-168241.5
(b) Repeat part (a), setting the zero configuration with the car at point A.
at point A
0
at point B
change in potential energy
-168241.5
-168241.5
X J
X J
Transcribed Image Text:A 900 kg roller coaster car starts at point A, then travels 125 ft at 40.0° below the horizontal to point B. (a) Taking point B to be the level where the gravitational potential energy of the car-Earth system is zero, what is the potential energy (in J) of the system when the car is at points A and B, and the change in potential energy (in J) as the coaster moves between these points? 168241.5 X J J X J at point A at point B change in potential energy 0 -168241.5 (b) Repeat part (a), setting the zero configuration with the car at point A. at point A 0 at point B change in potential energy -168241.5 -168241.5 X J X J
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