Doesnt' the answer depend on Cosine of the angle the excavator arm made at
impact w/ the span?
On Sat, Sep 20, 2008 at 10:46 PM, Its from Onion <areda..._at_msn.com>wrote:
>
>
>
>
>
> An excavator weighing 8 tons is on top of a flatbed trailer and heading
> east on Interstate 70 near Hays, Kansas. The extended shovel arm is
> made of hardened steel and approaching a two lane overpass made of 5,000
> psi concrete, reinforced with #6 steel bars spaced at 6 inches on center
> each way, each face.
>
> Solve: When the shovel arm hits the overpass, how fast does he have to
> be going to slice the bridge in half? (Assume no effect for headwind and
> no braking by the driver...)
>
> Extra Credit: Solve for the time and distance required for the entire
> rig to come to a complete stop after hitting the overpass at the speed
> calculated above.
>
> (see pix for answers)
>
> >
>
>
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<div dir="ltr"><div>For real, funny as hell, thanks for sending.</div>
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<div>Doesnt' the answer depend on Cosine of the angle the excavator arm made at impact w/ the span?<br><br></div>
<div class="gmail_quote">On Sat, Sep 20, 2008 at 10:46 PM, Its from Onion <span dir="ltr"><<a href="mailto:areda..._at_msn.com">areda..._at_msn.com</a>></span> wrote:<br>
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<div><br><br> An excavator weighing 8 tons is on top of a flatbed trailer and heading<br>east on Interstate 70 near Hays, Kansas. The extended shovel arm is<br>made of hardened steel and approaching a two lane overpass made of 5,000<br>
psi concrete, reinforced with #6 steel bars spaced at 6 inches on center<br>each way, each face.<br><br>Solve: When the shovel arm hits the overpass, how fast does he have to<br>be going to slice the bridge in half? (Assume no effect for headwind and<br>
no braking by the driver...)<br><br>Extra Credit: Solve for the time and distance required for the entire<br>rig to come to a complete stop after hitting the overpass at the speed<br>calculated above.<br><br>(see pix for answers)<br>
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Received on Sat Mar 02 2024 - 00:57:20 CST