The discussion centers around the physics of roller coasters, specifically addressing the forces at play when a roller coaster is at the apex of its track. Participants explore concepts related to centripetal acceleration, free body diagrams, and the role of velocity and gravity in maintaining the coaster's motion along the track.
Participants express varying levels of understanding regarding the forces acting on the roller coaster, with some agreeing on the role of centripetal acceleration while others remain uncertain about the implications of velocity and gravity. The discussion does not reach a consensus on the best way to conceptualize these forces.
Some participants highlight the need for clarity in understanding the relationship between forces and motion, particularly in the context of free body diagrams and the effects of different forces acting simultaneously. There are also references to misconceptions that may complicate the understanding of these concepts.
This discussion may be useful for students and educators interested in the dynamics of roller coasters, the application of Newtonian physics, and the exploration of common misconceptions in physics.
I assume you are talking about a coaster going upside down in a loop-the-loop fashion? If so, realize that the coaster is undergoing centripetal acceleration downward. So identify the forces on the coaster and use Newton's 2nd law.T@P said:
Inertia---It's moving! It "stays" up the same way a ball on the end of a string stays up if you were to swing it overhead. (It doesn't really stay up there---it goes around and back down.)T@P said:
In a loop, the acceleration is perpendicular to the velocity and the acceleration force is what you are looking forT@P said:
But it does fall down! It is accelerated downward due to the forces on it. (Keep in mind that a force is need to change a velocity, not cause a velocity.) It doesn't fall straight down, since it does have a sideways velocity.T@P said:
T@P said: