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7. A roller coaster car with mass 640 kg moves along the track shown in Figure 8. Assume all friction is negligible. B. Ay 30.0 m AY 15 m Figure 8 (a) Is the mechanical energy of the roller coaster conserved? Explain your answer. (b) If the roller coaster starts from rest at point A, what is its total mechanical cnergy at point A? (c) What is the total mechanical energy at point B?

7. A roller coaster car with mass 640 kg moves along the track shown in Figure 8. Assume all friction is negligible. B. Ay 30.0 m AY 15 m Figure 8 (a) Is the mechanical energy of the roller coaster conserved? Explain your answer. (b) If the roller coaster starts from rest at point A, what is its total mechanical cnergy at point A? (c) What is the total mechanical energy at point B?

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order to reach the height of the hoop. etch a graph of total raph of kinetic energy ncy are shaped the any maximum or 7. A roller coaster car with mass 640 kg moves along the track shown in Figure 8. Assume all friction is negligible. the ground below. etic energy of the vitational potential Ay=30.0 m %3D AY=15 m C evel surface, 14 Figure 8 y puck conserved? (a) Is the mechanical energy of the roller coaster conserved? Explain your answer. (b) If the roller coaster starts from rest at point A, what is its total mechanical cnergy at point A? (c) What is the total mechanical energy at point B? (d) Calculate the speed of the roller coaster when it rcaches points B and C. (e) If the car starts with a speed of 12 m/s at point A, calculate the speed of the roller coaster when it reaches points B and C. he initial kinetic avels down a a top elevation of k done on the skier vels from the top skier when he reaches EAssume he starts 8. A 52 kg woman jogs up a hill in 24 s. Calculate
Transcribed Image Text:order to reach the height of the hoop. etch a graph of total raph of kinetic energy ncy are shaped the any maximum or 7. A roller coaster car with mass 640 kg moves along the track shown in Figure 8. Assume all friction is negligible. the ground below. etic energy of the vitational potential Ay=30.0 m %3D AY=15 m C evel surface, 14 Figure 8 y puck conserved? (a) Is the mechanical energy of the roller coaster conserved? Explain your answer. (b) If the roller coaster starts from rest at point A, what is its total mechanical cnergy at point A? (c) What is the total mechanical energy at point B? (d) Calculate the speed of the roller coaster when it rcaches points B and C. (e) If the car starts with a speed of 12 m/s at point A, calculate the speed of the roller coaster when it reaches points B and C. he initial kinetic avels down a a top elevation of k done on the skier vels from the top skier when he reaches EAssume he starts 8. A 52 kg woman jogs up a hill in 24 s. Calculate
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