A projectile is fired at an angle 30 degrees to the horizontal at a muzzle velocity of 450 m/s. Graph the radius of curvature as a function of x, and as a function of time.(adsbygoogle = window.adsbygoogle || []).push({});

I'm pretty clueless here:

Here's what I think:

[tex]\vec a = (v^2/\rho)\hat {e_n} + \dot v\hat {e_t}[/tex]

where [tex]v[/tex] is the velocity in the direction of motion for any given point in space along the parabola, [tex]\rho[/tex] is the radius of curvature

so then from this

[tex]a_n = v^2/\rho[/tex]

where [tex]a_n[/tex] is the acceleration at any point in space along the parabola in the direction normal to the direction of motion

so therefore to find a plot of [tex]\rho[/tex] in terms of x, I must find

[tex]\rho = v(x)^2/a_n(x)^2[/tex]

so what I need to know is how to find the [tex]v(x)[/tex] and [tex]a_n(x)[/tex]

or am I going abouit this all wrong..thanks

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# Homework Help: Projectile motion graphs

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