Speed of a falling object from various heights?

does the ft. lbs change from different heightsSpeed of a falling object from various heights?
Foot-lbfs (lbf is pound-force, it is distinct from lbm or pound-mass) of energy vary directly with height.





(For those you aren't convince that this is unit energy, consider. You have a force acting through a distance which is the definition of work and work and energy are equivalent.)





Because kinetic energy varies with the square of the speed the velocity of a falling object is proportional to the square root of the height from which it fell.





Which is also supported by noting that the equation for distance traveled by a uniformly accelerated object starting from rest is:


d=(1/2)at^2


where d is distance


a is acceleration


t is timeSpeed of a falling object from various heights?
ft-lb is a force or work moving an object of one lb to a distance of one ft. a force is not use in a falling object, its the gravity that doing the work.


F = (Lb) * (ft)





for a free falling object neglecting air resistance, the relationship of velocity and height is


v = ( 2gh ) ^ (0.5)


v=velocity


g= acceleration of gravity


h= height
I'm not sure what you're asking. The pounds don't have any effect on how fast the object falls. The speed just depends on how many seconds have elapsed since the object started falling (or how far it has fallen). The combination of final speed and weight will determine how much damage it will do when it hits.
see this video it will help you understand the falling bodies





http://video.google.nl/videoplay?docid=3鈥?/a>
Are you talking about the force of impact?
No, foot pounds is a unit of torque.
See the video above it will help!