C calculate the speed of the ball immediately after

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Figure 5: Force versus displacement of a spring.
3. Both kinetic and potential energy are part of the thrill of roller coasters. For this exercise, you will examine the path of a roller coaster and describe what type of energy is at work. Use Figure 6 to answer the following questions: Figure 6: Different points in a roller coaster’s motion.
c. Calculate the speed of the ball immediately after the ball bounces off the ground.
a. Describe the kinetic and potential energy at each point of the roller coaster path.
b. What happens to the roller coaster’s kinetic energy between Points B and C? What happens to its potential energy between these points?
c. Why is it important for Point A to be higher than Point C?
d. What causes the roller coaster train to lose energy over its trip?

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