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Flashcards on Work and Energy
Click on the flashcard to see the answer
What is work?
Work is the transfer of energy that occurs when an object is moved against an opposing force.
What is energy?
Energy is the ability to do work.
What is the SI unit of work?
The SI unit of work is the joule (J).
What is the formula for work?
Work = Force × Distance
What factors affect the amount of work done?
The amount of work done depends on the magnitude of the force applied and the distance over which the force is applied.
What is kinetic energy?
Kinetic energy is the energy of an object due to its motion.
What is potential energy?
Potential energy is the energy stored in an object due to its position or condition.
What is the formula for kinetic energy?
Kinetic energy = 1/2 × Mass × Velocity^2
What is the formula for gravitational potential energy?
Gravitational potential energy = Mass × Gravitational acceleration × Height
What is the law of conservation of energy?
The law of conservation of energy states that energy cannot be created or destroyed, only transferred or transformed.
What is mechanical energy?
Mechanical energy is the sum of kinetic energy and potential energy of an object.
What are the different forms of energy?
Some forms of energy include mechanical, thermal, chemical, electrical, and nuclear energy.
What is power?
Power is the rate at which work is done or energy is transferred.
What is the formula for power?
Power = Work / Time
What is the SI unit of power?
The SI unit of power is the watt (W).
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Test Your Knowledge
Which of the following is the SI unit of work?
Meter
Joule
Newton
Watt
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What is the formula for work?
Force × Distance × Time
Force × Distance
Mass × Acceleration
Energy ÷ Time
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Which of the following is an example of potential energy?
A stretched rubber band
A running car
A flying bird
A swinging pendulum
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What is the formula for kinetic energy?
Mass × Velocity
1/2 × Mass × Velocity^2
Force × Distance
Energy ÷ Time
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Which energy transformation occurs when a toaster is used to toast bread?
Electrical energy to thermal energy
Mechanical energy to electrical energy
Thermal energy to mechanical energy
Chemical energy to electrical energy
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Which law states that energy cannot be created or destroyed, only transferred or transformed?
Ohm's law
Law of conservation of energy
Newton's law of motion
Boyle's law
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Which of the following is an example of mechanical energy?
A moving car
Sunlight
Electricity
Sound waves
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What is power?
The rate at which work is done or energy is transferred
The ability to do work
The resistance to motion
The force applied to an object
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What is the formula for power?
Power = Force × Distance
Power = Work ÷ Time
Power = Mass × Acceleration
Power = Energy × Time
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Which of the following is the SI unit of power?
Watt
Joule
Newton
Meter
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