(a) Define the potential energy of an object.?

(a) Define the potential energy of an object.


(b) Use a graph of a potential energy function to describe the equilibrium of an object in one dimensional motion.


(c) Define the position of the center of mass.


(d) A child sled starts from rest at the top of an icy hill, as shown in fig below. The portion of the path from f to q is circular, with radius R. Neglect any frictional effects what are the speed and normal force at point q?





I cant place diagram here, f to q is the portion of the circle that makes 90 degrees and radius R is 1/2 the height of the hill and f is at ground level.

(a) Define the potential energy of an object.?
Check this out:





http://en.wikipedia.org/wiki/Potential_e...





And try to do your HW your self!