Courses
Teacher-curated, self-paced courses. Looking for a guided sequence through a full topic? See Learning Paths.
6 courses
Friction and Circular Motion
Physics · High School (11–12) · Friction, Newton's Laws of Motion, Circular Motion
FreeCh 4 · 3/4
Friction stops a sliding box, and it also lets you walk and a car turn a corner. In this course we study static and kinetic friction, a block on a rough slope, and the force that keeps a body on a circle, which decides the safe speed of a car on a flat bend and on a banked road.
3Lessons12Problems3Python Labs1Question Set1Mock Test
Newton's Laws of Motion
Physics · High School (11–12) · Newton's Laws of Motion, Momentum and Collisions
FreeCh 4 · 1/4
When a bus starts suddenly, you lean back. When it stops, you lean forward. Why? In this course we find what a force really does. We learn Newton's three laws, the idea of momentum and impulse, and why a gun kicks back when it fires.
3Lessons12Problems2Python Labs1Question Set1Mock Test
Common Forces, Free-Body Diagrams and Connected Bodies
Physics · High School (11–12) · Newton's Laws of Motion
FreeCh 4 · 2/4
A good picture solves half of a mechanics problem. In this course we meet the forces that act in everyday life: weight, the push of a surface, the pull of a string and the force of a spring. We learn to draw a free-body diagram for each body, and we use it for equilibrium, for a person in a lift, and for blocks joined by a string over a pulley.
3Lessons12Problems2Python Labs1Question Set1Mock Test
Pulleys, Wedges and Turning Frames: A Dynamics Workshop
Physics · High School (11–12) · Newton's Laws of Motion
StandardFirst lesson freeExtra course
A pulley that moves twice as far as the load it lifts. A crate that slips on a truck that starts too hard. A toy that swings forward in a braking bus. Here Newton's laws meet many bodies at once: strings and constraints, stacked blocks and wedges, accelerating and rotating frames, and loops and banked bends. The problems are at the level of JEE Advanced, A-Level Physics and IB Higher Level, with a long timed paper.
3Lessons12Problems2Python Labs1Question Set1Mock Test
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The Second Law and Momentum
Physics · High School (9–10), General · Newton's Laws of Motion, Momentum and Collisions
FreeCh 2 · 2/3
Push a toy car with a force. Push a loaded truck with the same force. They do not speed up in the same way. Why not? This course gives the rule. It is Newton's second law. We also meet momentum, which tells us how hard a moving thing is to stop.
4Lessons13Problems2Python Labs1Question Set1Mock Test
The Third Law and Conservation of Momentum
Physics · High School (9–10), General · Newton's Laws of Motion, Momentum and Collisions
FreeCh 2 · 3/3
When you push a wall, the wall pushes you back. This is Newton's third law. It explains how a swimmer moves forward and why a gun moves backward when it fires. At the end we see why the total momentum of colliding objects does not change.
3Lessons12Problems1Python Lab2Question Sets2Mock Tests
Forces and the First Law
Physics · High School (9–10), General · Newton's Laws of Motion, Friction
FreeCh 2 · 1/3
You push a door. You pull a rope. Gravity pulls you down. All of these are forces. Here we learn how to add forces together and how to tell if they are balanced. Then we meet Newton's first law, and we see why a moving thing likes to keep moving.
3Lessons6Problems1Python Lab1Question Set1Mock Test