my person question thread is back in business. Here it is. I'm trying to figure out what the Force is of a 910,000 pound aircraft flying at 570 mph. I know that Force= Mass x Acceleration ...

that's right. the Net Force = 0.

that's like saying the planes that hit the world towers exerted 0 force.

okay, wait, maybe the acceleration is negative...from 570 mph down to 0. Hmm, okay, I gotta figure that out...

do some reading on net force, and applied force. and, yes, when the plane hits something, you have to assume that there will be an acceleration in the opposite direction from velocity to 0.

yeah, I gots it. I'll assume that it all happens in a second. That gives me an acceleration in the opposite direction of.... 570 mph = 821.333 ft/s 821.333 (=difference in speed)/1 second = 8...

anyone want to check me on this?

I'm not gonna do the math, but thats probably about right. you got the concepts right (after firguring out that when you go from really fast to 0, you are accelerating negatively (decelerating)) an...