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Work:
- Definition: Work is the product of the force applied to an object and the displacement of the object in the direction of the force. Mathematically, work (W) = force (F) × displacement (d) × cos(θ), where θ is the angle between the force vector and the displacement vector.
- Unit: The SI unit of work is the joule (J), equivalent to one newton-meter (N·m).
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Energy:
- Definition: Energy is the ability to do work and exists in various forms such as kinetic energy and potential energy.
- Kinetic Energy: Energy possessed by an object due to its motion, given by KE = 0.5 × mass (m) × velocity (v)².
- Potential Energy: Energy stored in an object due to its position or configuration.
- Conservation of Energy: Energy cannot be created or destroyed, only transformed from one form to another.
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Power:
- Definition: Power is the rate at which work is done or energy is transferred/transformed. It is given by P = W/t, where W is the work done and t is the time taken.
- Unit: The SI unit of power is the watt (W), equivalent to one joule per second (J/s).
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Applications:
- Work, energy, and power concepts find applications in mechanics, engineering, physics, and daily life activities.
- Examples include lifting objects, running machines, generating electricity, and designing efficient systems.
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