Work, Power, Kinetic and Potential Energy

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What is Work in physics?

Back

Work is defined as the product of force and the distance over which it acts. It is calculated using the formula: Work = Force x Distance (W = F x d). The unit of work is Joules (J).

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What is Power in physics?

Back

Power is the rate at which work is done or energy is transferred. It is calculated using the formula: Power = Work / Time (P = W / t). The unit of power is Watts (W).

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What is Kinetic Energy?

Back

Kinetic Energy is the energy an object possesses due to its motion. It is calculated using the formula: KE = 1/2 mv², where m is mass and v is velocity. The unit of kinetic energy is Joules (J).

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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 gravitational potential energy, it is calculated using the formula: PE = mgh, where m is mass, g is acceleration due to gravity, and h is height. The unit of potential energy is Joules (J).

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How do you calculate Work done when a force is applied?

Back

Work done can be calculated using the formula: Work = Force x Distance x cos(θ), where θ is the angle between the force and the direction of motion.

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What is the relationship between Work and 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.

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What is the Law of Conservation of Energy?

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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 happens to Kinetic Energy as an object slows down?

Back

As an object slows down, its kinetic energy decreases because kinetic energy is directly related to the square of its velocity.

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What is the formula for calculating Potential Energy?

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Potential Energy (PE) is calculated using the formula: PE = mgh, where m is mass (kg), g is the acceleration due to gravity (9.81 m/s²), and h is height (m).

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What is an example of work being done?

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An example of work being done is lifting a box off the ground. This involves applying a force over a distance.