Chapter 7: Energy and Power

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11 Terms

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Work (W) formula

W = F × s (Force multiplied by displacement)

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S.I. unit of Work and Energy

Joule (J)

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Power (P) formula

P = Work done / Time taken (W / t)

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S.I. unit of Power

Watt (W)

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Gravitational Potential Energy formula

mgh

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Elastic Potential Energy formula

½ Fx

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Kinetic Energy formula

½ mv²

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Principle of Conservation of Energy

Energy cannot be created or destroyed, but can be converted from one form to another.

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Pendulum energy at maximum height

Gravitational potential energy is maximum and kinetic energy is zero.

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Pendulum energy at minimum height (equilibrium)

Gravitational potential energy is minimum and kinetic energy is maximum.

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Total energy in a closed oscillation system

Constant