Work, Power, Energy_review

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What is work in physics?

Back

Work is done when a force causes an object to move in the direction of the force. It is calculated as the product of the force and the distance moved in the direction of the force (W = F × d).

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What is kinetic energy?

Back

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 mass and v is velocity.

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What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration. For example, an object at a height has gravitational potential energy.

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What is mechanical energy?

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Mechanical energy is the sum of kinetic and potential energy in an object. It represents the total energy of an object in motion and at rest.

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What does the law of conservation of energy state?

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The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

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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. It is calculated as P = W/t, where W is work and t is time.

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How do you calculate work done?

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Work done can be calculated using the formula W = F × d × cos(θ), where F is the force applied, d is the distance moved, and θ is the angle between the force and the direction of motion.

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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 work done when a force of one newton moves an object one meter.

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What is the relationship between work and energy?

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Work done on an object results in a change in energy. When work is done on an object, energy is transferred to it, increasing its energy.

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What is the formula for calculating kinetic energy?

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The formula for calculating kinetic energy is KE = 1/2 mv², where m is the mass of the object and v is its velocity.