I just saw a new F150 commercial where they drop, i think, 3000 pounds from a helicopter into the bed of the truck then it drives away. There was barely any damage but you could see the box warp a little. I'm guessing its real just like the airplane one. Anyone else see it?

 

lol i've seen it. Its old. And its as real as the f-150 as brakes for a cargo plane hahaha

 

that one is decieving. if you listen to what he says, he explains how it is "3000 pounds of force" not 3000 pounds of raw weight.

so when you calculate the velocity of the crate as it hits the truck bed, and factor that in, the crate weighs MUCH less then 3k pounds.

 

well if its 3000 lbs of force which is measured in Newtons.. therefore to get raw weight 3000/9.81m/s2 (gravity).. you get .... drumroll please.... 305lbs in the bed.... are we sure it wasn't 30k lbs of force? cause i doubt ford would advertise... "hey guys.. you can haul 300 lbs in the bed of your truck... thats impressive!" ... haven't seen the commercial... heard about it though.

 

The hell with stopping a plane, I just want to stop my trailer with these 35" tires!

 

3000 pounds of force is not measured in Newtons, it's measured in pounds (pound-force or lbf). 1 pound-force=4.45N. 3000lbf=674N.

 

damn you beat me to it, yes newtons is a si measure of force but since they said pounds well its...........drum roll please.........3000 pounds

o an when in american units gravity is 32.1 not 9.81

 

It actually might be 30,000 pounds of force. I thought thats what it was initially but that much weight in the bed just sounds ridiculous. What is the force at 30,000 pounds? I suck at physics.

 

dropping 30,000 pounds of force on the bed is like dropping 30,000 pounds on the bed

 

some people don't seem to be catching on...

lbs are force

If you want to equate a similar units to kilograms (mass) you have to talk about slugs in american units. The Slug is a unit of mass. The Pound is a unit of force.

 

Slugs? I don't remember that one in my Engineering Physics course.

Mass: kilograms (met.), pounds (eng.)
Force: Newtons (met.), pound-force (eng.)

Don't blame the messenger, this is the same system that gives us a random 12 inches to a foot.

 

I love physics and I am really very good at it, but I will admit the only thing that really gives me problems is all the damn units. We just need to come up with one way of measuring things, and one way only.

 

wow were did you go, knowledge of the slug is isential to do most any problem related to weight in american units....

http://en.wikipedia.org/wiki/Slug_%28mass%29

 

Well there you go, see the table including the "Engineering" column of units? That's how I was taught at my engineering college. However, I have never heard of or used a "kilopond."

edit: And after thinking about it, here's why. We tackled solutions dealing with problems on the moon, Mars, etc. Anywhere else a slug wouldn't be 32.2 lbs. Slugs would vary planet to planet due to each unique gravitational pull, which is why it won't be taught in engineering courses (too many variables). Universally, a pound mass is a pound mass is a pound mass...

 

I guess thats why I didn't do so well in physics.