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4 Cards in this Set
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- Back
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Energy work and power |
Energy : the capacity to do work in joules |
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Principle of Conservation of Energy: The principle of conservation of energy states that energy cannot be created nor destroyed but can be converted from one form to another. The total energy in n isolated system is constant. |
Energy Loss: Frictional and drag forces convert some of the total energy of a swinging pendulum to thermal energy. This thermal energy is dissipated to the surroundings and cannot be converted back into the kinetic energy or gravitational potential energy of the pendulum. |
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Work: Work done by a constant force on an object is the product of the force and the distance moved by the object in the direction of the force. W= F x S |
KE: E = 0.5 x m x v^2 GPE: E = mgh |
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Power: Rate of work done or rate of energy conversion. P = E / t |
The si unit of power is watt, one watt is defined as the rate of work done or energy conversion of one joule per second. The end |
