Unit 1 · 5 lessons
Dynamics
Forces and motion in a plane: projectiles and relative velocity, inclines and friction, connected objects and accelerating frames, and the forces behind uniform circular motion.
- 57 practice questions
- 39 flashcards
- 1 interactive lesson
Lessons
- 1Motion in Two Dimensions and ProjectilesSplitting motion into perpendicular components, adding velocities between moving frames like rivers and wind, and solving any projectile by treating its horizontal and vertical motion as two separate problems joined only by time.Interactive11 questions
- 2Forces on Inclines and FrictionDrawing free-body diagrams on a slope, splitting gravity into parts along and across the surface, the difference between static and kinetic friction, and the angle at which a resting block finally slides.11 questions
- 3Connected Objects and Frames of ReferenceSolving for the acceleration and tension when objects are joined by strings and pulleys, and understanding why a scale in an elevator or a passenger in a braking bus seems to feel forces that are not really there.12 questions
- 4Uniform Circular MotionWhy an object moving in a circle at constant speed is accelerating toward the centre, the equations that connect speed, radius, period and frequency, and how real forces such as friction, tension, gravity and the normal force keep things on a curved path.12 questions
- 5Banked Curves, Rotating Frames and Artificial GravityHow tilting a road lets the normal force do the turning, why a banked curve has both a minimum and a maximum safe speed, and what centrifugal and Coriolis effects look like from inside a rotating frame, from hurricanes to spinning space stations.11 questions