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#22 (permalink) | |
Music Addict
Join Date: Nov 2010
Location: hairball cluster
Posts: 326
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Last edited by skaltezon; 02-07-2012 at 07:30 PM. |
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#24 (permalink) |
Music Addict
Join Date: Nov 2010
Location: hairball cluster
Posts: 326
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Well, the time from firing to impact is 175/25 = 7 secs.
Reaches apogee midway at 3.5 secs., where vertical velocity = 0. What velocity will be exactly cancelled by gravity after 3.5 secs.?
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#26 (permalink) | |
Music Addict
Join Date: Mar 2009
Posts: 1,711
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Using the equation: y=v*t+.5*a*t^2 where: y = vertical displacement v= velocity t= time a = acceleration and figuring out that t=7 you have: 0 = v*7+.5*(-9.8)*7^2 which got me v= 34.3 m/s have no idea if that's actually right though |
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#28 (permalink) | |
Partying on the inside
Join Date: Mar 2009
Posts: 5,584
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Seeing the equation written that way (instead of the way my professor wrote it) makes things a lot easier. It's just a matter of plug and play then.
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#29 (permalink) | |
Music Addict
Join Date: Mar 2009
Posts: 1,711
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Here's the list I got it from in case you don't have them all: Horizontally Launched Projectile Problems |
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#30 (permalink) |
Partying on the inside
Join Date: Mar 2009
Posts: 5,584
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There are 4 of them that he said we'd need. Those I have typed into my phone. I don't have any with like Viy though... does that mean the initial velocity of Y, or is that the initial velocity multiplied by a number represented by Y?
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