Help me solve this equation please -- Roller Coaster Motion

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Homework Help Overview

The discussion revolves around a physics problem related to roller coaster motion, specifically focusing on the conversion of potential energy to kinetic energy. The original poster seeks guidance on understanding the relevant concepts and solving the problem involving a sled descending a ramp.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to identify the appropriate area of physics to study, mentioning kinematics and expressing confusion about the problem's requirements. Some participants suggest considering conservation of energy principles, while others reiterate the importance of potential and kinetic energy relationships.

Discussion Status

Participants have provided references to external resources on conservation of energy, which may help clarify the concepts involved. The original poster indicates that they have gained understanding and managed to solve the problem, though no explicit consensus or final solution is presented in the discussion.

Contextual Notes

The problem involves specific parameters such as mass, initial height, and final height, with a focus on gravitational acceleration. The original poster's inquiry reflects a need for deeper understanding of energy conservation in the context of the problem.

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
 
Last edited by a moderator:
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Conservation of energy
 
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Likes   Reactions: Purpleshinyrock
pasmith said:
Conservation of energy
thank you Sir
 

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