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ap physics 1
👉 AP Physics Essentials
👟 Unit 1 - Kinematics
1.1Position, Velocity, and Acceleration
🌀 Unit 2 - Dynamics
2.5Newton's Third Law and Free-Body Diagrams
🚀 Unit 3 - Circular Motion
3.0Unit 3 Overview: Circular Motion and Gravitation
3.3Gravitational and Electric Forces
3.4Gravitational Field/Acceleration Due to Gravity on Different Planets
3.5Inertial vs. Gravitational Mass
3.7Free-Body Diagrams for Objects in Uniform Circular Motion
⚡️ Unit 4 - Energy
4.1Open and Closed Systems: Energy
4.2Work and Mechanical Energy
⛳️ Unit 5 - Momentum
🎸 Unit 6 - Simple Harmonic Motion
6.1Period of Simple Harmonic Oscillators
🎡 Unit 7 - Torque & Rotational Motion
7.2Torque and Angular Acceleration
7.3Angular Momentum and Torque
💡 Unit 8 - Electric Charges & Electric Force
8.0Unit 8 Overview: Electric Charge and Electric Force
8.1Conservation of Charge
🔋 Unit 9 - DC Circuits
9.1Definition of a Circuit
9.3Ohm’s Law, Kirchhoff’s Loop Rule (Resistors in Series and Parallel)
🔊 Unit 10 - Mechanical Waves & Sound
10.1Properties of Waves
10.3Interference and Superposition (Waves in Tubes and on Strings)
✍️ Free Response Questions (FRQs)
Quantitative / Qualitative Translation
⏱️ 1 min read
June 8, 2020
The energy of a system is conserved.
When a system has no work being done on or by it, the total energy of the system is constant. This total energy can be internally converted among potential, kinetic, or thermal but never changes. This idea is the Law of Conservation of Energy and is one of the 4 major conservation laws in AP 1.
A key idea here is that this law only applies when there are no outside forces acting on the system. So a system consisting of a ball and the earth would have its energy conserved as the ball falls, but a system of a car would have its energy change as friction between the tires and the road removes kinetic energy.
Common situations where you’ll be asked to apply energy conservation include: falling objects, sliding or rolling down ramps, masses & springs, and planetary orbits.
To help visualize this conservation, watch the roller coaster below (no friction).
Image courtesy of PhysicsClassroom.
In this case, the TME is the total mechanical energy, or potential plus kinetic energies. Most of the time, when a question refers to the total energy, we really mean total mechanical energy.
🎥Watch: AP Physics 1 - Unit 4 Streams
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