force and motion
Do you have a question?
Not knowing what your specific question or your age is, I searched Google under the key words "force motion" to get these possible sources:
http://library.thinkquest.org/CR0215468/force_and_motion.htm
http://classroom.jc-schools.net/sci-units/force.htm
(Broken Link Removed)
I hope this helps. Thanks for asking.