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Homework Help
Introductory Physics Homework Help
Rollercoasters and Loops and Normal Forces
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[QUOTE="komarxian, post: 5367787, member: 582047"] [h2]Homework Statement [/h2] <I will attach a diagram below> In terms of m, g and r. FInd the normal force at the top of the loop. [h2]Homework Equations[/h2] ∑F = F[SUB]c[/SUB] = F[SUB]N[/SUB]+F[SUB]g[/SUB] ∴ F[SUB]c[/SUB]=F[SUB]N[/SUB]+F[sub]g[/sub] ∴F[sub]N[/sub] = F[sub]c[/sub] - F[sub]g[/sub] ∴ N=mV[sup]2[/sup]/r - mg [h2]The Attempt at a Solution[/h2] F[sub]c[/sub]=mV[sup]2[/sup]/r - mg and V[sup]2[/sup]=ra and a=g ∴C=mrg/r ∴C = mg ∴mg-mg=N ∴ N=0 N. BUT after discussing with a guy in AP Physics C at my school, he said that this is solving for the minimum height. SO I think I need to solve for the general equation to solve for the normal force at the top of the loop at any height using the variables m, g, and r only (I'm pretty sure that's what my instructions meant). Could anyone help please? I will send an image of my work as well. [/QUOTE]
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Rollercoasters and Loops and Normal Forces
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