Unformatted text preview: done by the net force on
an object as it moves between two points is equal to the
change in its kinetic energy. W Net = ∆K Conservative Forces
Conservative forces are defined to be those forces in which the work done by them does
NOT depend on the path, only on the endpoints.
Work Done by Two Conservative Forces W = −mg ∆y
Gravitational Force Spring Force §1 1·
W1→ 2 = GM E m¨ − ¸
© 2 r1 ¹
W1→ 2 = − 1
k ( x 2 − x12 )
2 (near Earth) (general expression) Three ways of looking at it N W W Conserva>on of mechanical energy Ui + Ki = Uf + Kf è༎ ΔK = – ΔU = mgh Conservative Forces and Potential Energy MAIN POINTS
The change in potential energy that is associated
with a specific conservative force as an object
moves between two locations is defined as
negative the work done by that force between
those two locations.
A potential energy function can be defined for the
object and the particula...
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