Conversion of Energy Forms of Energy Energy Work Energy.

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Presentation transcript:

Conversion of Energy Forms of Energy Energy Work Energy

Work The product of force and displacement in the direction of the force W = F x d Units: Newton-meter, Nm Equivalent to Joule, J

Work Example A force of 10N is applied to a box to move it 2m along the floor. What is the work done on the box? A bodybuilder, 1.6 m tall lifted a 30-kg weight from the ground up to his head. How much work did he do?

Energy The ability to do work Work ~ Energy Units: Nm, J May be: Transferred Stored Transformed

Forms of Energy Kinetic Energy Potential Energy Energy due to motion Equation: EK = ½ mv2 Potential Energy Energy due to position Equation: EP = mgh

Examples What is the kinetic energy of a 3-kilogram ball that is rolling at 2 meters per second? What is the potential energy of a 3 kilogram-ball that is 3m above the ground?

Forms of Energy Chemical Energy Nuclear Energy Energy due to chemical reaction Nuclear Energy Energy due to nuclear reaction

Forms of Energy Thermal Energy Electrical Energy Energy transferred due to difference in temperature Electrical Energy Energy due to movement of charges

Forms of Energy Light Energy Sound Energy

Conversion of Energy

Conversion of Energy

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