Chapter 10

# Chapter 10 - Chapter 10 Energy as a Conserved Quantity E K...

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Chapter 10 Energy as a Conserved Quantity 2 main types of energy kinetic and potential Energy units: 1 joule = 1 J = 1 kg m 2 /s 2 = 1 N m for both types. Gravitational Potential Energy This is valid for any frictionless surface, regardless of shape. Speed at the bottom of a ramp is affected by the height not the path. Sometimes use conservation of momentum and energy in the same problem and then solve for V1x Conservation of Mechanical Energy This is conservation of mechanical energy. E K U = + in out E E E ∆ = - mech E K U = +

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-Choose a system without friction or other losses of mechanical energy. - Draw a before-and-after pictorial representation. Define symbols that will be used in the problem, list known values, and identify what you’re trying to find. - The mathematical representation is based on the law of conservation of mechanical energy. Elastic Solids and Restoring Forces An “elastic” material is one that exhibits a restoring force , a force that acts so that it restores a system to an equilibrium position. Examples are springs and rubber bands.
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## This note was uploaded on 04/28/2008 for the course PHY 2111 taught by Professor Johnevans during the Summer '07 term at Georgia Perimeter.

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Chapter 10 - Chapter 10 Energy as a Conserved Quantity E K...

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