UNIT 7 - Work, Power, and Energy
Standards:
SP3. Students will evaluate the forms and transformations of energy.
SP3a. Analyze, evaluate, and apply the principle of conversation of energy and measure the components of work-energy theorem by Describing total energy in a close d system. Identifying different types of potential energy. Calculating kinetic energy given mass and velocity. Relating transformations between potential and kinetic energy.SP3b. Explain the relationship between matter and energy
SP3f. Analyze the relationship between temperature, internal energy, and work done in a physical system.
SP3g. Analyze and measure power.
SP3. Students will evaluate the forms and transformations of energy.
SP3a. Analyze, evaluate, and apply the principle of conversation of energy and measure the components of work-energy theorem by Describing total energy in a close d system. Identifying different types of potential energy. Calculating kinetic energy given mass and velocity. Relating transformations between potential and kinetic energy.SP3b. Explain the relationship between matter and energy
SP3f. Analyze the relationship between temperature, internal energy, and work done in a physical system.
SP3g. Analyze and measure power.
Unit Summary
In this unit we learned how to calculate work, power, kinetic energy, and potential energy. Energy is never lost it is only transformed. The change in potential energy equals the change in kinetic energy. We also learned how calculate the kinetic energy of a football player with a mass on 80kg running at a 8 meters per second. We performed many labs like Potential Energy v. Kinetic Energy ( Picture is shown above). One of my favorites formulas is the GPE = mgh because you can used it to calculate the potential energy of an object if your given the height, mass and the gravity ( Gravity in earth is always 9.8 meters per second).
Key Vocabulary
Energy is the ability to work and doing work on an object changes its energy. Both work and energy are measured in Joules.
Work is the product of the component of the force exerted on an object in the direction of displacement and the magnitude of displacement.
Work-Kinetic Theorem states that the net work done on an object equals its change in kinetic energy.
Power is the rate at which work is done.
Chemical energy is stored in the bonds among atoms
Mechanical energy is stored by the position of an object; in an un-stretched rubber band, a compressed spring, or the position of an object above the earth.
Nuclear energy is stored in the nucleus of an atom. The energy that holds a nucleus together.
Thermal energy, or heat, is due to the vibration of atoms and molecules.
Sound energy is due to the movement of particles by compression waves.
Electromagnetic energy is due to the movement of electrons and the field forces they produce.
Gravitational Potential Energy is due to effect of gravity on an object
Kinetic Energy is calculated as one half the mass of an object times velocity squared.
Elastic Potential Energy (PEelastic) is the energy stored in a spring or rubber band when it is stretched or compressed.
Formulas:
Types of energy
Mechanical
Kinetic (movement) KE= 1/2 MV^2
Gravitational Potential PEg= Mass *Gravity * Height
Elastic Potential
Electrical
Conservation of Energy
KEi + PEi = KEf + PEf
KEi + PEi + Fd = KEf + PEf ( FRICTION)
Other Formulas
W=Fnet*D ( If an object does not move than no work is being done.)
1J= 1NM ( Newton Meter)
Vf2=vi2+2ad
Work = (force)(distance)(cos X)
W = Fd(cosX)
Power = work / time
Power = (Force)(velocity) P = W/t OR P = Fv
Kinetic Energy = ½(mass)(velocity)2
KE = 1/2mv2
Gravitational Potential Energy = (mass)(acceleration due gravity)(height)
GPE = mgh
Efficiency = Work output / Work input
In this unit we learned how to calculate work, power, kinetic energy, and potential energy. Energy is never lost it is only transformed. The change in potential energy equals the change in kinetic energy. We also learned how calculate the kinetic energy of a football player with a mass on 80kg running at a 8 meters per second. We performed many labs like Potential Energy v. Kinetic Energy ( Picture is shown above). One of my favorites formulas is the GPE = mgh because you can used it to calculate the potential energy of an object if your given the height, mass and the gravity ( Gravity in earth is always 9.8 meters per second).
Key Vocabulary
Energy is the ability to work and doing work on an object changes its energy. Both work and energy are measured in Joules.
Work is the product of the component of the force exerted on an object in the direction of displacement and the magnitude of displacement.
Work-Kinetic Theorem states that the net work done on an object equals its change in kinetic energy.
Power is the rate at which work is done.
Chemical energy is stored in the bonds among atoms
Mechanical energy is stored by the position of an object; in an un-stretched rubber band, a compressed spring, or the position of an object above the earth.
Nuclear energy is stored in the nucleus of an atom. The energy that holds a nucleus together.
Thermal energy, or heat, is due to the vibration of atoms and molecules.
Sound energy is due to the movement of particles by compression waves.
Electromagnetic energy is due to the movement of electrons and the field forces they produce.
Gravitational Potential Energy is due to effect of gravity on an object
Kinetic Energy is calculated as one half the mass of an object times velocity squared.
Elastic Potential Energy (PEelastic) is the energy stored in a spring or rubber band when it is stretched or compressed.
Formulas:
Types of energy
Mechanical
Kinetic (movement) KE= 1/2 MV^2
Gravitational Potential PEg= Mass *Gravity * Height
Elastic Potential
Electrical
Conservation of Energy
KEi + PEi = KEf + PEf
KEi + PEi + Fd = KEf + PEf ( FRICTION)
Other Formulas
W=Fnet*D ( If an object does not move than no work is being done.)
1J= 1NM ( Newton Meter)
Vf2=vi2+2ad
Work = (force)(distance)(cos X)
W = Fd(cosX)
Power = work / time
Power = (Force)(velocity) P = W/t OR P = Fv
Kinetic Energy = ½(mass)(velocity)2
KE = 1/2mv2
Gravitational Potential Energy = (mass)(acceleration due gravity)(height)
GPE = mgh
Efficiency = Work output / Work input
Article - How Solar Energy Works
Article Summary: This article explains how solar energy can be transformed into energy we can use. The solar power is an inexhaustible source of power that many people don’t seem to know. It provides a clean alternative to the fossil fuel that currently pollutes our air and water. Given the abundance amount of solar energy, this resource is poised to play with and might serve a big role in our energy for future. One solar panel In the desert can produce more than 6 Kilowatt-hours per day.
Article Summary: This article explains how solar energy can be transformed into energy we can use. The solar power is an inexhaustible source of power that many people don’t seem to know. It provides a clean alternative to the fossil fuel that currently pollutes our air and water. Given the abundance amount of solar energy, this resource is poised to play with and might serve a big role in our energy for future. One solar panel In the desert can produce more than 6 Kilowatt-hours per day.