Available Courses
Physics IFall 2025 - Spring 2026
An introductory classical mechanics course - covering the standard topics in a freshman physics I course.
We'll be releasing modules as we write them. The course should be complete sometime in February 2026!
Your Learning Outcomes
• Define displacement, distance, average/instantaneous velocity and acceleration; choose a sign convention.
• Translate real‑world scenarios into kinematics variables and diagrams; set up 1D motion models.
• Apply kinematic equations to solve multi‑step problems.
• Analyze and construct x–t, v–t, and a–t graphs; use slope and area to move between representations.
• Model free‑fall with g; compare upward/downward motion; handle piecewise and relative motion in 1D.
• Build a systematic problem‑solving framework for planning, executing, and solving multi‑step problems.
• Work with 2D vectors in components; add/subtract vectors and understand angles and rotations.
• Solve projectile motion problems, including from different launch heights.
• Connect position-time, velocity-time, and acceleration-time graphs with two-dimennsional motion.
• Model 2D relative motion with velocity addition and reference frames.
• Apply relative motion strategies to solve multi-step problems in two dimensions
• Draw and interpret free‑body diagrams; identify system and surroundings.
• Apply Newton's Laws to relate net force, mass, and acceleration.
• Model common forces: weight, normal, tension, and friction (static/kinetic); analyze inclined planes.
• Analyze interacting objects and third‑law pairs; treat multiple‑object systems with internal/external forces.
• Solve equilibrium and accelerated‑motion problems in 1D/2D using components and (F=ma).
• Define angular position and angular displacement; work in radians with angular velocity.
• Connect linear and angular motion; relate speed, radius, and centripetal acceleration.
• Analyze uniform circular motion with free‑body diagrams; identify the centripetal direction and use period and frequency to connect motion with time.
• Model systems: conical pendulum, banked curves (with/without friction), and horizontal/vertical circles; evaluate apparent weight.
• Apply Newton’s Law of Universal Gravitation and understand the gravitational field; analyze circular orbits and Kepler’s third law.
• Define work using force and displacement; interpret the sign and units; connect area under the force‑versus‑position graph to work done.
• Distinguish kinetic, gravitational potential, and elastic potential energy; build energy bar charts and graphs for multi‑step situations.
• Apply the work–kinetic energy theorem to relate net work to changes in speed for motion on ramps and in circular paths.
• Use conservation of energy alongside work ideas to connect changes in kinetic and potential energy, understand how work by conservative forces relates to changes in potential energy, and track how non‑conservative forces add or remove energy from a system.
• Describe and calculate power as how quickly energy is transferred or transformed, and solve quantitative problems involving power and energy rates.
Unit 6: Linear Momentum and Collisions
• Define linear momentum (p=mv); choose a sign convention and track direction for objects and systems.
• Classify multi‑object systems; isolated vs. non‑isolated, total momentum, and the link to center‑of‑mass velocity.
• Define impulse from average force and time; its direction matches the force.
• Use the impulse–momentum theorem; impulse is area under force‑time, force is slope of momentum‑time.
• Apply momentum conservation in 1D and 2D; separate internal vs. external forces; analyze collisions, recoil, and explosions.
• Classify collisions (perfectly inelastic, inelastic, elastic); pair momentum with kinetic energy to find final speeds and energy loss.
• Solve 2D collisions with component diagrams for unknown angles or speeds.
Unit 7: Statics and Torquecoming soon
Unit 8: Rotational Motion and Angular Momentumcoming soon
Unit 9: Oscillationscoming soon
Unit 10: Fluidscoming soon
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Core
A full physics education
$29/month
Billed monthly
- Personalized learning path
- Spaced repetition system
- Lessons and multi-steps
- Access to all courses
- Free Response Questions (FRQs)
- Full-length practice exams
- Score guarantee
Test Prep
Everything you need to ace the AP exam
$99/month
Billed monthly
- Personalized learning path
- Spaced repetition system
- Lessons and multi-steps
- Access to all courses
- Free Response Questions (FRQs) with AI grading
- Full-length practice exams
- Guaranteed 5 or your money back
All plans include a 3-day free trial. Cancel anytime. 14-day no-questions-asked refund policy. The score guarantee applies to Test Prep subscribers who complete the full curriculum before their exam.