Help me solve this equation please -- Roller Coaster Motion

AI Thread Summary
To solve the sled problem, understanding the conservation of energy is crucial, as it involves converting potential energy to kinetic energy. The sled, with a mass of 100 kg, starts from a height of 12.2 m and descends to a height of 4.58 m. The key to finding the speed at point 3 lies in applying the principles of gravitational potential energy and kinetic energy. After reviewing the relevant physics concepts, the user successfully solved the problem, confirming the importance of studying energy conservation in roller coaster motion. This discussion emphasizes the foundational role of energy principles in solving physics problems related to motion.
Purpleshinyrock
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Homework Statement
I need help understanding this exercise
Relevant Equations
dont know
Hello. Can someone tell me what area of phisics should I study to better understand this exercise( I ve been looking at kinematics since it asks for the velocity but I can't seem to find where it talks about different points like this) and also what should I do to solve this exercise please?
A sled with a mass equal to 100 kg departs from rest at point 1 ( h 1 = 12.2 m) and descends figure ramp, without friction.
Screenshot_2021-04-01 M23 - Fis_Qui_Aluno_int_ProvaModelo_vfinal pdf.png

What is the speed of the sled when it reaches point 3, at a height h 3 = 4.58m?

(Use g = 10.0 m ∙ s -2 ).

□ (A) v 3 = 6.77 m ∙ s -1

□ (B) v 3 = 8.73 m ∙ s -1

□ (C) v 3 = 12.35 m ∙ s -1

□ (D) v 3 = 15.62 m ∙ s -1

□ (E) v 3 = 152.40 m ∙ s -1
 
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Conservation of energy
 
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pasmith said:
Conservation of energy
thank you Sir
 
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