Work, Power and Energy

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What is Work in physics?

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Work is defined as the product of the force applied to an object and the distance over which that force is applied, in the direction of the force. It is calculated using the formula: Work (W) = Force (F) × Distance (d) × cos(θ), where θ is the angle between the force and the direction of motion.

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What is Power in physics?

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Power is the rate at which work is done or energy is transferred over time. It is calculated using the formula: Power (P) = Work (W) / Time (t). The unit of power is the Watt (W), where 1 Watt = 1 Joule/second.

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What is Energy?

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Energy is the capacity to do work. It exists in various forms, such as kinetic energy, potential energy, thermal energy, etc. Energy cannot be created or destroyed, only transformed from one form to another.

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What is Kinetic Energy?

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Kinetic energy is the energy possessed by an object due to its motion. It is calculated using the formula: KE = 1/2 mv², where m is the mass of the object and v is its velocity.

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What is Potential Energy?

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Potential energy is the energy stored in an object due to its position or configuration. For gravitational potential energy, it is calculated using the formula: PE = mgh, where m is mass, g is the acceleration due to gravity, and h is the height above a reference point.

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How is Work related to Energy?

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Work is a means of transferring energy from one system to another. When work is done on an object, energy is transferred to that object, increasing its energy.

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What is the relationship between Work, Power, and Time?

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Power is the rate at which work is done. Therefore, if more work is done in a shorter amount of time, the power output is greater. Conversely, if the same work is done over a longer time, the power output is lower.

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What is the formula for calculating Power?

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Power (P) = Work (W) / Time (t). This formula shows how much work is done in a given time period.

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What is the unit of Work?

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The unit of work is the Joule (J), which is defined as the amount of work done when a force of one newton displaces an object by one meter in the direction of the force.

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What is the unit of Power?

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The unit of power is the Watt (W), where 1 Watt is equal to 1 Joule per second.