Synchronous curves By eliminating from the ideal

Chapter , Problem 29PE

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Synchronous curves By eliminating from the ideal projectile equations

\(x=\left(v_{0} \cos \alpha\right) t, y=\left(v_{0} \sin \alpha\right) t-\frac{1}{2} g t^{2}\)

Show that \(x^{2}+\left(y+g t^{2} / 2\right)^{2}=v 0^{2} t^{2}\). This shows that projectiles launched simultaneously from the origin at the same initial speed will, at any given instant, all lie on the circle of radius centered at \(\left(0,-g t^{2} / 2\right)\), regardless of their launch angle. These circles are the synchronous curves of the launching.

Equation Transcription:

Text Transcription:

X = (v_0 cos alpha)t, y = (v_0 sin alpha)t - ½ gt^2

x^2 + (y+gt^2 /2)^2 = v0^2 t^2

(0, -gt^2 /2)

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