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Questions and Answers
Which of the following is true about work in physics?
Which of the following is true about work in physics?
- Work is equal to force divided by distance
- Work can be calculated for a varying force by differentiating the force relative to the distance moved
- Work is measured in Joules (correct)
- Work is always in the same direction as the force applied
Which form of energy is the energy of motion?
Which form of energy is the energy of motion?
- Spring potential energy
- Conservative energy
- Kinetic energy (correct)
- Potential energy
What is the formula for calculating power in physics?
What is the formula for calculating power in physics?
- Power = work / time (correct)
- Power = energy x time
- Power = force x distance
- Power = mass x velocity
Which of the following is true about potential energy?
Which of the following is true about potential energy?
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What is the difference between conservative and non-conservative systems in terms of energy loss?
What is the difference between conservative and non-conservative systems in terms of energy loss?
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What is the formula for calculating average power in physics?
What is the formula for calculating average power in physics?
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Study Notes
Understanding Work, Energy, and Power in Physics
- Work in physics means applying a force over a certain distance to a system.
- Work is equal to the force applied times the distance moved, and is measured in Joules.
- Work can be calculated even if the force applied is not in the same direction as the movement.
- Work can also be calculated for a varying force by integrating the force relative to the distance moved.
- Energy is the ability to do work and comes in different forms, including kinetic and potential energy.
- Kinetic energy is the energy of motion and is equal to half the mass times velocity squared.
- Potential energy is energy that could be used to do work, and includes gravitational and spring potential energy.
- Conservative systems do not lose energy through work, while non-conservative systems can lose energy.
- Average power is work over time and is measured in Watts.
- Power can also be calculated by multiplying net force by average velocity.
- Power is important in studying electricity and how energy moves in a circuit.
- Crash Course Physics is produced in association with PBS Digital Studios.
Understanding Work, Energy, and Power in Physics
- Work in physics means applying a force over a certain distance to a system.
- Work is equal to the force applied times the distance moved, and is measured in Joules.
- Work can be calculated even if the force applied is not in the same direction as the movement.
- Work can also be calculated for a varying force by integrating the force relative to the distance moved.
- Energy is the ability to do work and comes in different forms, including kinetic and potential energy.
- Kinetic energy is the energy of motion and is equal to half the mass times velocity squared.
- Potential energy is energy that could be used to do work, and includes gravitational and spring potential energy.
- Conservative systems do not lose energy through work, while non-conservative systems can lose energy.
- Average power is work over time and is measured in Watts.
- Power can also be calculated by multiplying net force by average velocity.
- Power is important in studying electricity and how energy moves in a circuit.
- Crash Course Physics is produced in association with PBS Digital Studios.
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