Teacher tools for this standard
Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework
Teacher tools for this standard
Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework
- Lesson Plan →Objectives, pacing and practice, built from this lesson's brief.
- Guided Notes →One page your students fill in and keep.
- Exit Ticket →Three items at the end of class. No student accounts.
- Re-teach →After an exit ticket: who missed what, and what to do tomorrow.
- Homework →Assign practice; it grades itself.
"We saw earlier that mechanical energy can be either potential or kinetic. In this section we will see how energy is transformed from one of these forms to the other. We will also see that, in a closed system, the sum of these forms of energy remains constant."
"At any point in the ride, the total mechanical energy is the same, and it is equal to the energy the car had at the top of the first rise. This is a result of the **law of conservation of energy**, which says that, in a closed system, total energy is conserved—that is, it is constant. ... $$KE_1 + PE_1 = KE_2 + PE_2.$$"
"The phrase *in a closed system* means we are assuming no energy is lost to the surroundings due to friction and air resistance."
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"We saw earlier that mechanical energy can be either potential or kinetic. In this section we will see how energy is transformed from one of these forms to the other. We will also see that, in a closed system, the sum of these forms of energy remains constant."
"At any point in the ride, the total mechanical energy is the same, and it is equal to the energy the car had at the top of the first rise. This is a result of the law of conservation of energy, which says that, in a closed system, total energy is conserved—that is, it is constant. ... $$KE_1 + PE_1 = KE_2 + PE_2.$$"
"The phrase in a closed system means we are assuming no energy is lost to the surroundings due to friction and air resistance."
What you'll learn
- Explain how mechanical energy transforms between potential and kinetic forms
- State the law of conservation of energy and explain what a "closed system" means
- Apply the conservation equation KE₁ + PE₁ = KE₂ + PE₂ to solve for an unknown energy or speed
- Calculate gravitational potential energy as mgh and kinetic energy as ½mv² at points in a process
- Use the mass-cancellation shortcut (2gh = v²) to find landing speeds without knowing the mass
- Identify friction as the reason real transformations lose useful energy as heat
Slides
Step through the lesson, or watch it as a narrated video
Slides
In development
Not yet available • Check back soon!