Physics
High School (11–12)
Mechanics › Newton's Laws of MotionMechanics › FrictionMechanics › Momentum and CollisionsMechanics › Circular MotionChapter 4Laws of Motion
Why does a book on a table stay still, a hockey puck slide on and on, and a car skid on a wet road? Three laws, written by Newton more than three hundred years ago, answer all of these and many more. In this chapter we learn the three laws, we draw the forces on a body, we solve problems with pulleys, slopes and friction, and we find the force that keeps a car on a bend. Python solves the equations and draws the graphs.
Part of Physics · High School (11–12) (chapter 4)
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Newton's Laws of Motion
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.
Common Forces, Free-Body Diagrams and Connected Bodies
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.